... &skilled worker 3strict QC 2011 OEM investment aluminum casting flange1:OEM service available2:Material: aluminum,grey iron, ductile iron, carbon iron, ... zinc ,bronze, copper, brass,stainless steel3:Standard: ISO, ANSI, ASTM,, JIS, DIN, GB4:Weight Range ... machine.comTel: 0086-411-83701520Fax:0086-411-83704610 2011 OEM aluminum investment casting flange