1) Refractive index: 1.56 2) Abbe value: 38 3) Specific gravity:1.28 4) 35% thinner than CR-39 lens slim and thin, UV 380nm cut off 5) Power range: Diameter: 70mm SPH: 0.00~-10.00 SPH: 0.00~-8.00 / CYL: -0.25~-2.00 RX Power Range: CYL: -2.25~-4.00 6) Available for hard-coating, hard coating tin table (HCT) and hard-multi coating (HMC)(AR-coating), EMI UV400, etc. 7) Finishing and semi-finishing are available Skype: clearoptical