... ,tin bronze,copper alloy Ferrules/brass sleeve bushing Used for king pin kit. Brass Sleeve/Bushing 1.Material: copper,tin ... machining--surface treatment---packing---delivery 5.Application : can used on king pin kit, autos , tractor , and ships 6.Advantages: (1 ... and machines promise good quality (4)Machines: CNC , automatic lathe, thread rolling machine ,punching, laser dutting , cold header.ect. (5) ...