Detailed Product Description CR-39 lens 1.499 indexUC/HC/EMI/HMCRefractive index=1.499Specification gravity:1.28Abbe: 42UV: 380Available:UC,HC.HMC,EMIHard coatedMulti coated in color: blue, green, glod, purpleAR coatedHydrophobicDiameter 56mm/60mm/65mm/70mm(D28/70mm)/75mm