... bronze,copper alloy Ferrules/brass sleeve bushing Used for king pin kit. Brass Sleeve/Bushing 1.Material: copper,tin,zinc,lead ... ,ASTM ,DIN ,JIS ect. 3.Process: sand casting ,investment casting ,die casting and so on 4.drawings--mould making---raw casting ... --surface treatment---packing---delivery 5.Application : can used on king pin kit, autos , tractor , and ships 6.Advantages: (1)Years' experience ...