ES2410 Product Description · 2 Colors of fluorescent ink in 1 pen. · Saturated Color. · Easy to handle. · Extremely convenient to change color. · Water-resistant · UV - resistant · Suitable to use on paper. Length: 135 x Φ21mm Nib: Chisel nib Writing Width: 3.6 mm Ink: Water based, Pigment, Non-toxic Color: Pink+Yellow/Green+Yellow/Orange+Yellow//Blue+Yellow