Abbe Value:58, Specific Gravity:1.32, Uncoated, Hard Coating for both lens surface 1, Refractive Index:1.562,Monomer: PPG Japan3,Abbe Value:584,Specific Gravtity:1.325,Uncoated6,Hard Coating for both lens surface 1.50 HC Tintable eyeglass lens,cr39 lens,optical lenses