1) Optical lens: CR-39 2) Nd=1.499 3) Dia: 55--70mm Features:(1) Diameter :55mm, 60mm, 65mm. 70mm(2) Available in UC, HC, HMC(3) Available power range:G(0-8) , G(0-8)/2, G(0-6)/4(4) Delivery Lead Time: 10-45days(5) Terms of payment: T/T.(6) Supply Ability: 300, 000prs/month(7) Minimum Order: 15prs/power , 3000prs/order(8) Carton dimention: 15 boxes/ carton 1.499 cr39 optical lens