... sample charge from the first quantity order About us:Center Optical Co.Ltd, was established in 1993, and have been ... quality products.We mainly produce:- Our key products include sunglasses, optical frames, reading glasses(with metal, stainless steel, titanium, acetate, ... units a year with a complete set of productuion line and equipment.http://www.centeroptical.cnTel:86-577-86362488Fax:86-577 ...