1) Product Name:Optical progressive lenses
2) Refraction Index Nd= 1.499
3) Abbe Value: 58
4) Specific Gravity: 1.32
5) Diameter:75mm
6) Coating: HC,HMC+EMI
7) HMC+EMI coating
8) Package: white envelopes or as customers' requirement
9) Semi-finished or finished are available