1.quality assurance:high density and precision 2 ... ,DIN , Production way : Brass by sand casting ,centrifugal casting and metal mould casting .Main material :Phosphor bronze:ZCuSn10PAlluminium Bronze: ZCuAl9Fe4 ... ZCuAl10Fe4Ni4Leaded Tin Bronze: ZCuSn6Pb6Zn3 / ZCuSn5Pb5Zn5 / ZCuSn10Pb10 Major products: Casting, Bronze casting, Aluminum casting, Cast metal part, Copper fitting, Copper nut, Bushing, Gear ...