Specifications
1) Material:NK-552) Nd=1.56
3) Dia: 70/75mm
4) Corridor: Short & Regular
1) Product: optical lens/lenses (Progressive lenses)
2) Abbe value: 38
3) Specific gravity: 1.28
4) High scratch resistance
5) 35% thinner than CR-39 lens
6) HMC+EMI coating and Uv protection
7) Tintable to various fashionable colors
8) Products are passed the high test of CE and ISO
9) Semi-finished or finished are available
10) Package: white envelopes or as customers' requirement