Detailed Product Description
1) Material:CR 39 
2) Refraction Index Nd= 1.56
3) Abbe Value: 42
4) Specific Gravity: 1.32
5) Diameter:65/70mm

1) Product Name:CR 39 Photichormic Optical Lens
2) Refraction Index Nd= 1.56
3) Abbe Value:  42
4) Specific Gravity: 1.32
6) Diameter:65/70mm
7) Coating: HC HMC+EMI(Green,Blue)
8) photobrown and photogrey are available
9) No base color
10) Package: white envelopes  or as customers' requirement
11) Semi-finished or finished are available