上海康拓光學設備有限公司
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Features:
1. 266pcs full-aperture trial lens of 21mm in diameter, the thickness of lens is only 3mm.
2. Metal ring and power marks printed on single side of the handle.
3. Cylinder and prism lens in square shape to prevent rotation.
4. The PD range of the trial frames: 44/46/48/50/52