The Hong Kong Standards And Testing Centre Ltd (STC)

In order to help manufacturers ensure the safety and control the quality of their products, STC provides a wide range of comprehensive Chemical Testing services for products including:   Household Chemicals Cleaners Antibacterial Effectiveness TestSodium HypochloriteContent(ASTM D2022)Anionic Active Matter ContentPhosphorus ContentEtc.Toothpaste Fluoride ContentPH ValueDiethylene Glycol ContentEtc.Industrial Chemicals Thinner(e.g. toluene, benzene content)Petroleum ProductsViscosityDensityElement ContentEtc.If you have any further question, please feel free contact us or visit our website: https://www.stc.group/en/contact 

Chemical Product Testing

The chemical, food and pharmaceutical product testing service is carried out by the renowned Hong Kong Standards and Testing Centre (STC). It providesa wide variety of analytical services, certification and technical services to the chemical, environmental, food, health supplement, pharmaceuticals, proprietary Chinese medicine, metallurgical and plastics industries.	Chemical testing.	Environmental analysis.	Food testing.	Pharmaceutical product testing.	Chinese medicine testing.

Chemical, Food and Pharmaceutical Product Testing

TUV Rheinland HK Ltd

  This toys, childcare products and chemicals testing service is especially designed and offered to toy manufacturers. The professionals are experienced and offer added efficiency. This testing service&nbsp;aims&nbsp;at protecting our beloved children.    
 
   Reliable and effective.    
   With excellent after-sales supports.  
 

Product and Chemical Testing Service

 The centre offers analytical services to demonstrate and prove that your materials and products are free from restricted substances and have fulfiled related safety standards before they enter the markets. Our tests include heave metal testing, dimethyl fumarate testing, REACH testing, and more. Offering professional and high-quality services, we are the chemical testing centre you need. Heavy metal (EN 71 Part 3) testing.Dimethylfumarate (DMF) testing.REACH (SVHC) testing.Azo dyes (aromatic amines) testing.Formadehyde content testing.Chromium VI content testing.Lead content testing.Pentachlorophenol content (PCP) testing.Cadmium testing.Alkylphenol polyethoxylate (APEO) testing.

Chemical Testing and Analytical Service 

Chemical for Electric Toys and Children's Products EU Directive 2011/65/EU: ROHS 2Following substances are restricted:	Lead	Cadmium	Chromium VI	Polybrominated Biphenyls (PBB)	Polybrominated Diphenyl (PBDE)	Bis (2Ethylhexyl) Phthalates (DEHP)	Butyl Benzyl Phthalate (BBP)	Dibutyl Phthalate (DBP)	Diisobutyl Phthalate (DIBP)	MercuryIf you have any further question, please feel free contact us at enquiry@stc.group or visit our website: https://www.stc.group/en/services/detail/european-toy-safety

EU ROHS Chemical Testing

Chemical for Toys and Children's Products EU Directive 2009/48/EC include:CMR Substances (Concentration Limits)	Cat 1A	Cat 1B	Cat 2Fragrances (Concentration Limits)Nitrosamines and Nitrosatable Substances (Migration Limits)Restricted Substances Listed in Appendix C of Annex II	TCEP	TCPP	TDCP	BPA	BIT	CMI	MI	CMI:MI	Formamide	PhenolIf you have any further question, please feel free contact us at enquiry@stc.group or visit our website: https://www.stc.group/en/services/detail/european-toy-safety

EU Directive 2009 48 EC Chemical Testing

Characterization for materials used in medical devices – an analysis of a material’s composition, purity, uniformity, sterilant residuals and extractables – is an essential step to verify their suitability for human body contact, thus should not be missed out throughout the product life cycle.  Following the enforcement ofRoHS2 in the European Union, which restricts the use of specified hazardous substances in electrical and electronic equipment, and medical devices are now added to the scope of the Directive and have to be verified asRoHS-compliant.  The chemical laboratory at STC is equipped with the most advanced testing equipment; our team of experts can perform material characterization and RoHS analysis with a wide range of testing methods. We can help manufacturers identify the appropriate testing program based on the intended use of a device and material, and its expected nature of contact with the human body. Material Characterization - Guidelines &amp; Standards U.S. FDA Blue Book Memorandum GP#95-1ISO 10993-1, “Biological Evaluation of Medical Devices”ISO 10993-18, “Chemical Characterization of Materials”FDA Guidance Document, “Container Closure Systems for Packaging Human Drugs and Biologics” Material Characterization Testing Capabilities Physiochemical TestFourier Transform Infrared Spectroscopy (FTIR)High-Performance Liquid Chromatography/mass Spectrometry (HPLC-MS)Gas Chromatography / Flame Ionization Detector (GC / FID)Gas Chromatography / Mass Spectrometry (GC / MS)Inductively Coupled Plasma Spectrometry (ICP)Specific GravityGel-Permeation Chromatography (GPC)ViscosityDifferential Scanning Calorimetry (DSC)If you have any further question, please feel free contact us or visit our website: https://www.stc.group/en/contact 

Chemical Testing for Medical Devices

Increased pressure on global resources, energy conservation and environmental protection has driven the consumer demand for eco-compatible, compostable and biodegradable products. Textile and footwear manufactures must not only ensure products safety for consumers but also consider environmental impacts and the benefits of environmentally friendly products.    STC can assist manufacturers in implementing essential safety and quality measures to ensure that products are free of harmful chemicals and that chemical restrictions of international markets are followed. As environmentally friendly products are becoming an integral part of global economic development, STC’s eco-textiles and biodegradable testing services can help manufacturers assure that products are not only safe for consumers but also safe for the environment as well.   Our Eco-textiles &amp; Biodegradability Testing services include: Eco-textile Testing Azo DyesAllergenic DyesCarcinogenic DyesDetermination of OdorsFlame RetardantsFormaldehydeHeavy Metal AnalysisOrganotin CompoundsPesticidespH ValuePhthalatesRelease of NickelBiodegradability Testing Anaerobic Biodegradation of Plastic Materials(ASTM D5511)Anaerobic Biodegradation &amp; Disintegration of Plastic(ISO 15985)Plastics Degradability (ASTM D6954)If you have any further question, please feel free contact us or visit our website.

Eco-Textiles and Biodegradable Materials Testing

 Children&#39;s Jewelry Testing 
STC is offering comprehensive Children&#39;s Jewelry testing to ensure product safety and quality. As excess content of heavy metal may trigger contact allergies and dermatitis, children&#39;s jewelry and accessories, such as bracelets, earrings, necklaces, and rings, must comply with Registration, Evaluation, Authorisation, and Restriction of Chemicals (REACH) chemical regulations for nickel release, lead, cadmium and phthalates to be marketed in the EU.
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Those intended for markets in the United States must comply with chemical limits set forth by the U.S. Consumer Product Safety Improvement Act (CPSIA), American Society for Testing and Materials (ASTM) F2923 and California&#39;s Proposition 65.
&nbsp;
 Children&#39;s Jewelry Testing services include:  	 Total Lead Content 	 Total Cadmium Content 	 Nickel Release 	 Heavy Metal Testing 	 Phthalates 	 Physical Testing (tension, torque, flammability, sharp point, sharp edge, small parts, etc.)&nbsp;   Country  	 Europe (EN71-3, EN1811, EN12471 &amp; EN12472, REACH) 	 USA (CPSIA, ASTM F2923 &amp; ASTM E1613, California&rsquo;s Proposition 65) 	 China (GB 28480)  If you have any further question, please feel free contact us at enquiry@stc.group or visit our website: https://www.stc.group/en/services/detail/children-jewelry

Children Jewelry Testing

STC’s food science experts have been assisting many government departments, food manufacturers, processors, hotels, restaurants, catering service centers and fast food chains meet regulatory market requirements and address consumer safety concerns.  Food Nutrition Analysis and Nutrition Labeling Hong Kong 1+7 Nutrition Label(CFS)China Nutrition Label(GB 28050)Australia Nutrition Label(FSANZ)USA Nutrition Label(FDA)Canada Nutrition Label(Health Canada)EU Nutrition Label Regulation(EU No. 1169/2011) Food Product Safety Testing Heavy Metals Adulterants(HK Food Regulation: Sb, As, Cd, Cr, Pb, Hg, Sn)Pesticide Residues(e.g. fipronil, organochlorine, organophosphorus, etc.)Harmful Chemicals in Food(e.g. melamine, phthalates, aflatoxins, biotoxins, etc.)Animal Drug ResiduesFood Additives Artificial Coloring MatterArtificial SweetenerPreservativesProhibited Additives(e.g. sudan red, formaldehydes, boric acid, salicylic acid, etc.)Shelf Life Study STC provides real time and accelerated shelf life study to assist food manufacturers in evaluating and verifying product ‘use by’ or ’best before’ date(s) for compliance to statutory or commercial requirements.Physical, chemical and microbiological processes are critical factors altering the quality and safety of food.Parameters below could help monitor the composition of food products: Food Quality Testing(e.g. moisture content, water activity, fat rancidity, etc.)Chemical Properties(e.g. peroxide value, pH, acidity levels, etc.)Pharmaceutical Adulterants ScreeningMicrobiological Analysis (e.g. food-borne micro-organisms, total viable count, Enterobacteriaceae, etc.)If you have any further question, please feel free contact us or visit our website: https://www.stc.group/en/contact

Food Quality Testing & Food Nutrition Analysis

The Hong Kong Standards and Testing Centre provide a full range of professional testing, inspections and certification services according to your own specifications or major international standards.Testing services on product categories:	Chemical, Food &amp; Pharmaceutical Products	Textiles, Footwear, Furniture &amp; Materials	Electrical Products	Toys &amp; Children's Products	Medical Devices​Certification related testing and supporting services:	China Compulsory Certification (CCC)	Europe CE Mark	GCC G-Mark	Hong Kong OFCA Certification	Hong Kong Safety Mark	Japan Safe Goods (SG) Mark	Japan ST Mark	Japan PSE Mark	US CPSIA Certification	US FCC sDoCWe also provide a wide variety of inspection services for major consumer products including garment, toys, bag, footwear, electrical, electronic, watch and clock and sundry products. We also provide factory evaluation and audit services, such as Code of Conduct, Social Audit and LaboratoryAudit.

Testing Inspection Certification Service

The Hong Kong Standards and Testing Centre provide a full range of professional testing, inspections and certification services for customers in Hong Kong, mainland China and the global market.Provide professional testing service.	Full range of professional testing, inspections and certification services.	Suitable for different products, such as chemicals, food, electrical, textile, and others.	Accredited by China National Accreditation Service for Conformity Assessment (CNAS).	Accredited by Federal Communications Commission (FCC).	Accredited by Deutsche Akkreditierungsstelle GmbH (DAkkS).	For customers in Hong Kong, mainland China and the global market.

Professional Testing Service

V-Trust Inspection Service Co., Ltd

Our labs are fully accredited by CNAS, CPSC, CMA, CBTL, ILAC-MRA, FCC, and many more qualifications, and our testing reports are recognized worldwide. We could help clients to arrange 360 °C evaluation testing to distinguish their products in the crowded market, including below testing scopes:  Product Compliance Testing: Food Contact Materials: LFGB, DGCCRF, EC1935/2004 (EU), FDA, etc. Electronics &amp; Electrical appliances: RoHS, LVD, EMC, FCC, RED, etc. Toys &amp; Juvenile products: EN71, ASTM F963, CPSIA, CPC, etc. Harmful substances: REACH, POPs, California 65, PFAS, etc.  Product Evaluation Testing Material composition analysis: Identify the material &amp; the elemental makeup. Samples comparison: Compare &amp; test products carefully and help to select the right products. Performance testing: Evaluate product quality and safety. Tailor-made testing: salt spray test, burning test, lifetime, etc.  Working with us in testing &amp; certifications brings you the following benefits： √ Accreditation by All Major Markets including Europe, North &amp; South America. √ Distinguish your brands in the crowded market. √ Ensure your products confirm to the latest international standard. √ Well-edited testing photos and videos to highlight your unique selling points. √ Free Sample Picking, One-Stop Service from Lab Testing to On-Site Inspection. 

Sample Check / Product Compliance Testing / Certification / Chemical Analysis / Product Comparison Test

Sample Check / Sample Evaluation / Product Compliance Testing / Certification / Chemical Analysis / Product Comparison Test

 Toy Safety Testing 
STC offers comprehensive testing services to ensure the safety and regulatory compliance for toys and children&rsquo;s products entering the European market. Our European Toy Safety Testing services include:
&nbsp;
 The EU Toy Safety Directive 2009/48/EC 
All toys that are sold in the European Market must meet the standards set out in the EU Toy Safety Directive 2009/48/EC to ensure that the product is safe and fit for its purpose.
&nbsp;
 EN71 Testing  	 EN71 Part 1 &ndash; Physical and Mechanical Test 	 EN71 Part 2 &ndash; Flammability Test 	 EN71 Part 3 &ndash; Migration of Toxic Elements Test 	 EN71 Part 4 &ndash; Experimental Set for Chemistry 	 EN71 Part 5 &ndash; Chemical Toys (Sets) Other than Experimental Sets 	 EN71 Part 7 &ndash; Finger Paints 	 EN71 Part 8 &ndash; Swings, Slides &amp; Similar Activity Toys for Indoor &amp; Outdoor Family Domestic Use 	 EN71 Part 9 &ndash; Organic Chemical Compounds 	 EN71 Part 12 &ndash; Nitrosamines &amp; Nitrosatable substances 	 EN71 Part 13 &ndash; Fragrances in Certain Toys 	 EN71 Part 14 &ndash; Trampolines for Domestic Use  If you have any further question, please feel free contact us at enquiry@stc.group or visit our website: https://www.stc.group/en/services/detail/european-toy-safety

European Toy Testing EN71

Phthalates content is limited in different countries or regionsFollowing phthalates are limited:	Diisobutyl Phthalate (DIBP)	Dibutyl Phthalate (DBP)	Benzyl Butyl Phthalate (BBP)	Bis(2-ethylhexyl) Phthalate (DEHP)	Di-isononyl Phthalate (DINP)	Di-isodecyl Phthalate (DIDP)	Di-n-octyl Phthalate (DNOP)	Dimethyl Phthalate (DMP)	Diethyl Phthalate (DEP)	Di-n-hexyl Phthalate (DNHP/DHEXP)	Di-n-pentyl Phthalate (DPENP)	Dicyclohexyl Phthalate (DCHP)If you have any further question, please feel free contact us at enquiry@stc.group or visit our website: https://www.stc.group/en/services/detail/toys

Toy Phthalates Testing

Toy Safety TestingREACHToys and children’s products manufacturers, distributors, retailers and importers are responsible for compliance and managing the risks associated with their chemical uses under the Annex XVII of REACH directive which contains the list of restrictions on certain hazardous substances, mixtures and articles for their marketing and use on the European market.​STC offers comprehensive testing services to ensure the safety and regulatory compliance for toys and children’s products entering the European market. Our European Toy Safety Testing services include:REACH Annex XVII Testing	Azodyes &amp; Azocolorants	Benzene	Cadmium	DMF (Dimethylfumarate) (2011/135/EU)	Lead in Jewelry Products	Nickel and its compounds	Nonylphenol(NP) &amp; Nonylphenol Epoxyentes (NPE)	Organotin (DBT, TBT, TPhT, DOT)	PAHs (Polycyclic aromatic hydrocarbons)	Phthalates Content in Plasticized Materials	SCCP (Short Chain Chlorinated Paraffins)	TolueneIf you have any further question, please feel free contact us at enquiry@stc.group or visit our website: https://www.stc.group/en/services/detail/european-toy-safety

European REACH Toy Testing

Accreditation: HOKLAS, DAkkS, SASO, CNAS, CCC, HKSI, CE, FCC, Japan Food Sanitation Law, GTTR, HKQAA &amp; ST MARK. 	 Age grading assessment. 	 Aging and pre-conditioning. 	 Bacteriological testing. 	 Chemical analysis. 	 Electrical toy safety testing. 	 Electro magnetic compatibility. 	 Flammability testing. 	 Food contact article analysis. 	 Helmet and bicycle testing. 	 Material and product evaluation. 	 Packaging assessment. 	 Performance and reliability testing. 	 Physical and mechanical testing. 	 Transportation testing. 	 Babies dummies and bottle teats. 	 Baby walking frames. 	 Child safety barriers. 	 Children&#39;s cots. 	 Children&#39;s high chairs. 	 Playpens. 	 Sunglasses. 	 Wheeled child conveyance and strollers. 	 Writing instruments and stationeries.  

Toys and Children's Products Testing

STC’s product safety testing services covers LVD testing to assist manufacturers in meeting CE Mark requirements.    The LVD covers health and safety risks on electrical products operating with an input or output voltage of between: 50 and 1000 V for alternating current75 and 1500 V for direct currentIt applies to a wide range of electrical equipment including:Household Electrical Appliances(e.g. coffee machines, refrigerators, microwave ovens, etc.)AV Products(e.g. TV sets, radios, video players, etc.)Luminary (Lighting) ProductsIT &amp; Office EquipmentCablesPower Supply UnitsLaser EquipmentElectrical Accessories &amp; certain components(e.g. fuses)Common Electrical Safety Testing Although commonly referred to as electrical safety testing, the actual assessments carried out extend well beyond a product’s electrical characteristics and includes: Electric Shock Hazards TestingEnergy Related Hazards TestingFlammability TestingHeat Related Hazards TestingMechanical Hazards TestingRadiation TestingChemical Hazards TestingAbnormal Operation Testing(faults and failures within the equipment)If you have any further question, please feel free contact us or visit our website: https://www.stc.group/en/contact 

Low Voltage Directive (LVD) Testing

STC is aSATRAaccredited testing laboratory with extensive experience in leather and footwear testing. We provide our customers consistent quality assurance and peace of mind that their products are safety compliant and ready for the market.Our comprehensive testing capabilities extends to all types of leather products and footwear including children’s, athletic, and leather shoes.Our Leather &amp; Footwear Testing services include:Leather Testing	Leather Identification(ISO 17131)	Flex Endurance Performance of Leather(BS 6159, M&amp;S, SATRA)Physical Performance Evaluation	Whole Shoe, Upper Insole &amp; Outsole	Slip Resistance Testing(BS EN ISO 13287, JIS, SATRA)	Hazardous Chemicals Analysis(BS EN 1122, BS EN ISO 3071, DIN 54231,LFGB § 64 BVL B 82.02.9, JIS)	Waterproof Testing(ASTMD2099, SATRA)	Washability Testing(SATRA)	Flammability Testing(SATRA)If you have any further question, please feel free contact usor visit our website.

Leather and Footwear Testing

 Toys and Children&#39;s Products Testing 
Accreditation: HOKLAS, DAkkS, SASO, CNAS, CCC, HKSI, CE, FCC, Japan Food Sanitation Law, GTTR &amp; ST MARK.
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 	 Age grading assessment. 	 Aging and pre-conditioning. 	 Bacteriological testing. 	 Chemical analysis. 	 Electrical toy safety testing. 	 Electromagnetic compatibility. 	 Flammability testing. 	 Food contact article analysis. 	 Helmet and bicycle testing. 	 Material and product evaluation. 	 Packaging assessment. 	 Performance and reliability testing. 	 Physical and mechanical testing. 	 Transportation testing. 	 Writing instruments and stationeries.&nbsp;  If you have any further question, please feel free contact us at enquiry@stc.group or visit our website: https://www.stc.group/en/services/detail/toys

Children Toys Testing

From wallets, handbags, and backpacks to luggage, the design and purpose of these articles is to safely hold our valuables and personal items. To ensure that these products met their intended purposes, bags and luggage testing is essential in meeting consumer products expectations as well as ensuring compliance with safety standards and requirements.STC’s comprehensive bag and luggage testing services can assist manufacturers and retailers in meeting consumer expectations through extensive product performance testing such strength and durability, the functionality of zippers, straps, buckles, handles, wheels, fastenings etc., as well as the overall product quality and safety.Our Bags, Luggage &amp; Accessories Testing services include:Physical Performance Testing	Durability Testing	Rolling Testing(SATRA)	Drop Testing(SATRA)	WaterResistance(AATCC 22, 35)	Static &amp; Dynamic Loading Testing(SATRA)	Hazardous Chemicals Analysis(EN 14362, LFGB § 64 BVL B 82.02.9, DIN 54231,BS EN ISO 14184-1, BS EN ISO 3071, BS EN 1122)Accessories	Spectacle &amp; Sunglasses Testing(ISO 12312, ISO 12870)	Button Performance Testing(ATSM F963, EN 71, ISO 8124-1, GB 6675)	Zipper Performance Testing(BS 3084)	Belt Performance Testing(SATRA)	Corrosion Resistance Testing(ASTM B117, ISO 9227)If you have any further question, please feel free contact us or visit our website.

Bags, Luggage and Accessories Testing

Protective Clothing Testing BS EN 14120STC provide full scope of Protective Clothing testing for wrist, palm, kne and elbow protectors for users of roller sports equipment.	Protective Clothing Testing	Innocuousness Testing	Restraubt Testing	Abrasionresistance Testing	Impact strength Testing	Impact performance Testing	Stiffness of wrist protectors TestingIf you have any further question, please feel free contact us at enquiry@stc.group orvisit our website:https://www.stc.group/en/services/detail/sporting-goods

Sport Products Protective Clothing Testing 

STC's Biocompatibility Testing services for medical devices includes:	Absorbent Incontinence Products  	Adhesives     	Blood Collection &amp; Storage Devices  	Bone Void Fillers  	Central Nervous System Implants	Combination Products 	Contact Lenses   	Dental Implants  	Devices Containing Antimicrobials	Device Raw Materials	Hemodialysis Disposables	Implantable Drug Delivery Devices  	Infusion / transfusion Devices	Intraocular Lenses	Laparoscopes &amp; Endoscopes  	Ocular Implants	Orthodontic Devices	Orthopedic Implants	Ostomy Devices	Reusable Devices	Surgical Gloves	Sutures	Syringes	Urinary Stents	Urologic Catheters	Vascular Catheters	Vascular Grafts	Vascular Stents	Ventricular Assist Devices	Wound Drainage Devices	Wound DressingsCytotoxicity Study Test (3 weeks lead time)	MTT Method(ISO 10993-5)	Agarose Overlay Method(ISO 10993-5 / USP 87)	Filter Diffusion Method(ISO 10993-5)	Direct Contact Method(ISO 10993-5 / USP 87)	MEM Method(USP 87)Irritation &amp; Skin Sensitization Test	Skim Sensitization Study (GPMT / Closed-patch)(ISO 10993-10) (6 - 8 weeks)	Skin Irritation Test(ISO 10993-10) (3 weeks)	Intracutaneous (Intradermal) Reactivity Test(ISO 10993-10 / USP 88)(3 weeks)	Oral Mucosa Irritation Test(ISO 10993-10) (8 - 10 weeks)	Vaginal Irritation Test(ISO 10993-10) (8 - 10 weeks)	Penile Irritation Test(ISO 10993-10) (8 - 10 weeks)	Rectal Irritation Test(ISO 10993-10) (3 months)	Ocular Irritation Test(ISO 10993-10) (3 - 4 weeks)Systemic Toxicity Test	Acute Systemic Toxicity Test(ISO 10993-11 / USP 88) (3 weeks)	Subacute Systemic Toxicity Test (14 days / 28 days)(ISO 10993-11) (6 or 8 weeks)	Subchronic Systemic Toxicity Test (90 days / 180 days)(ISO 10993-11) (5 or 8 months)	Pyrogen Test(ISO 10993-11) (3 weeks)Local Effects after Implantation Test(ISO 10993-6) (at least 4 weeks)	Implantation in Subcutaneous Tissue Test	Implantation in Muscle Test	Implantation in Bone TestInteractions with Blood Test (2 weeks)	Hemolysis Test(ISO 10993-4 / GB)	Hemolysis Test(ASTM F756)	APTT、PT、TT、FIB(ISO 10993-4 / GB)	Platelet Count Test	Complement Test(ISO 10993-4 / GB)	Thrombosis Test(in Vivo / in Vitro)(ISO 10993-4 / GB)Genotoxicity Test (ISO 10993-3)	Ames Test(8 weeks)	Mouse Lymphoma Assay Test(10 weeks)	Chromosome Aberration Test (10 weeks)If you have any further question, please feel free contact us atenquiry@stc.groupor visit our website:https://www.stc.group/en/contact

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