Detailed Product Description
1) Material:CR 39
2) Refraction Index Nd= 1.49
3) Abbe Value: 58
4) Specific Gravity: 1.28
5) Diameter:65/28mm 70/28mm

1) Product Name:CR 39 Flat-top optical lens
2) Refraction Index Nd= 1.49
3) Abbe Value:  58
4) Specific Gravity: 1.28
6) Diameter:65/28mm 70/28mm
7) Coating: HC HMC+EMI(Green,Blue)
8) Package: white envelopes  or as customers' requirement
9) Semi-finished or finished are available
10)CE Standard