This radian apparatus is specially designed for accurate measurements of lenses of 1.523 and 1.7 refractive index. The outer dial displays lens curvature of 1.7 refractive index, inner dial for 1.523 refractive index. Ball tips can prevent the damage of lenses. Easy to operate, read, and calibrate. It is well-made of stainless-steel and not rusts. A cover will protect points from being destroyed. Custom-made LOGO can be printed on the dial of radian clock.
1.Easy to operate, read and calibrate;
2.Test range: +/-20 diopter
4. Size: 80x100x28mm
5. Weight: 142.5g
6. Material: stainless steel
7. Packaging Details:1 pc/box,60pcs/carton, Carton size:35x33x33cm, Gross weight:11kgs