Material: brass, copper,tin bronze,copper alloy Ferrules/brass sleeve bushing Used for king pin kit. Brass bushing Sleeve1.Material: copper,tin,zinc,lead,Tin bronze,Manganese brass,Silicon brass,Nickel copper alloy such as brass: H57 H59 H62 ; bronze/ aluminum bronze: 633 10-1,9-4 ect.2.Standard: GB ,ASTM ,DIN ,JIS ect.3.Process: sand casting ,investment casting ,die casting and so on 4, ...