1) refractive index: 1.56\n2) abbe value: 38\n3) specific gravity: 1.28\n4) transmission: above 97.8%\n5) 35% thinner than cr-39 lenses slim and thin, uv 380nm cut off\n6) diameter: 55mm, 60mm, 65mm for plus and 70mm for minus\n7) finished lenses power range:\n a) s: plano ~ -8.00 / c: -0.25 ~ -2.00\nb) s: +0.25 ~ +6.00 / c: -0.25 ~ -2.00\n8) available for hard-coating, hard coating tintable (hct),\n hard-multi coating (hmc)(ar-coating), emi uv400, etc.\n9) semi-finished lenses:\nbase: 0.00, 2.00, 4.00, 6.00, 8.00, 10.00\nskype: clearoptical