Abbe Value:58, specific Gravity: 1.32, Hard Coating For both lens Surface 1,Refravtive Index:1.502,Monomer: PPG Japan3, Abbe Value:584,Specific Gravtity:1.325, Uncoated6,Hard Coating for Both Lens Surface eyeglasses lenses,1.499 optical lens, resin lens, CR39 Lenses