CR-39 Resin lens has been producing main product of Jinmu company,and the company has owned himself base produced. CR-39 is pointed out producing by USA.PPG Company, and the brand registered belong to own by the comany,It is a raw material with ma ked use of producing 1.499 mdel completely adopt the raw material by USA .PPG Company. More About Yacool lens Of China Jinmu optics... 1.499 Index(CR-39) Resin Lens 1.499 Index(CR-39) Bifocal Resin Lens 1.499 Index(CR-39) Progressive No-line bi