Detailed Product Description
1) Material:CR 39
2) Refraction Index Nd= 1.56
3) Abbe Value: 42
4) Specific Gravity: 1.32
5) Diameter:75mm

1) Product Name:CR 39 Progressive Optical Lens
2) Refraction Index Nd= 1.56
3) Abbe Value:  42
4) Specific Gravity: 1.32
5)Short corridor:14mm 17mm
6) Diameter:75mm
7) Coating:HC HMC+EMI(Green,Blue)
8) Package: white envelopes  or as customers' requirement
9) Semi-finished or finished are available