1、32 lenses altogether (16 in each bar), 2 bars for each of concave (-) and convex (+); MINUS in red and PLUS in black Sphere: +/- 0.50, 1.00, 1.50, 2.00, 2.50, 3.00, 3.50, 4.00, 5.00, 6.00, 7.00, 8.00, 9.00, 10.00, 12.00, 15.00
2、Package: Comes with a blue pocket for protective product storage Red & Black Blue nylon packet included
3、Design Adopting environmentally friendly materials, safe and healthy.
4 Application: it is suitable for the quick examination of diopter of spectacles
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