Specification :

cr39 1.56 photochromic lens
1.diameter: 70mm/ 65mm
2.abble value 38
3.transimission: over the 98%
4.specific gravity: 1.28
5.abrasion resistance:6/8 H
6.photochormic brown (grey, blue, pink, green, orange, purple)
7.reflective index: 1.533
8.double hard(scrtch resistant) coating
9.low reflection multi(anti reflective)coating
10.anti-Eml coating
11.99%of visual transmitance
12.sph:0.00-8.00
cyl: 0.00-2.00
13. high quality with low price
14. if you are interested in it, feel free to contact with me for details