CR-39, Resin, Polycarbonate, Single Vision, Bifocal,Photochromic, UC,HC,HMC 1.49/1.56/1.61/1.67/1.71, 55mm/60mm/65mm/70mm Manufacture, factory price, well experienced in manufacturing and trading. good contacts in eyewear industry, supply all lenses, frames and cases. optical lenses