Cr39 Optical Lenses Semi-Finished S / F Ophthalmic Lenses

Cr39 1. 499 semi-finished lensDetailed selling lead descriptionFeatures: 1) nd: 1. 4992) diameter: 70mm3) seg. : 28mm4) base: 200b, 400b, 600b, 800b5) add:  + 1. 00 to + 3. 006) Central thickness: 7. 0-8. 9mmTypes: 1) semi-finished st28 bifocal lenses2) semi-finished st28, st25 and st32 blended lenses3) semi-finished st28 and st24 round top bifocal lenses