... 2)high-standard technician team 3)strict quality control Copper tube hoop1.Material: The part showed is made up of copper ... do any metal or alloy parts,such as stainless steel,carbon steel,ductile iron,melleable iron,aluminum,grey iron,bronze etc ... excellent serviceMaterial Grey iron,ductile iron,malleable iron,stainless steel, carbon steel,aluminium,brass etc.standardDIN, ASTM, BS, JIS etc.processsand ...