1) Reflective index: 1.61 2) Abbe value: 34 3) Specific gravity: 1.27 4) Transmission: 98~99%, Abrasion resistance: 6~8H 5) Design: Spherical and Aspherical 6) Finished Lenses: Power Range: Diameter: 70mm/75mm Sph: 0.00 ~ -12.00 Sph: 0.00 ~ -10.00 / Cyl: 0.00 ~ -2.00 Sph: 0.00 ~ +6.00 / Cyl: 0.00 ~ -2.00 Rx Power Range: Sph: 0.00 ~ -6.00 / Cyl: -2.25 ~ -4.00 Sph: 0.00 ~ +4.00 / Cyl: -2.25 ~ -4.00 7) Coating: HMC(AR coating) EMI UV400 coating, double hard(scratch resistant) coating, low reflection multi(anti reflective) coating 8) 100% intercept to UV400nm rays, Protection from ultra-violet rays, Protection from infrared, Eliminates static electricity 9) Semi-finished Lenses: Base: 50, 200, 400, 600, 800 Skype: clearoptical