... Suppliers of raw materials: Shanghai Changjin Industry Co.,Ltd Materials: (Wuhan Iron and steel,Website:http://www.drumclosure.com, Maanshan Iron and steel ... rolled sheet,steel cladding material: Cr3,Cr6 Thickness: 2.0mm,1.8mm,1.5mm,1.2mm Products: Drum plug , drum flange, lever ... lock for drum ,leak lock plug Finished: Zinc plated, ...