... workcraft 2 years warranty,OEM The product showed are Bronze casting:1.process: Sand casting+CNC machining +surface ... treatment 2.Material: Bronze, Copper,Brass3.weight:around 0.01kg-10kg4.Material available: ... , ductile iron, grey iron, alloy steel, aluminium, copper, bronze,brass, etc5.Application:Valve parts6:Workcraft :Precision casting, sandcasting, investment ...