Detailed Product Description 1.67 high index lens(Optical lens)Asperic and SphericMaterial: MR-7 from JapanDiam: 65mm, 70mm, 75mmPower range: 0.00 to -12.00/0.00 to -4.00Coating: HC, HMC, EMIUV400Finished and Semi-finished availableSemi-finished base in 2, 4, 6, 8, 10