... , Weaving, Polishing, Pharmacy, Hardware, Working with fiberglass, Cement, etc.Package :Package 15pcs/box 180pcs/CTNAbout us:Shanghai Gangkai ... of the leading mask manufacturers in China. Our factory locates in Songjiang, Shanghai with 20,000 square ... management, we provide our customer best quality & high performance product . Factory Information:Address:5885 Beisong Road, Songjiang, Shanghai , P.R ...