Cylinder parts Material: Stainless steel,cast iron Sand casting and machining ISO9001:2008,OEM service ... grey iron, ductile iron, carbon iron,zinc ,bronze, copper, brass,stainless steel3:Standard: ISO, ANSI, ASTM,, JIS, DIN, GB4:Weight ... No.6, Taiping Industrial Zone,Pulandian, Dalian, Chinahttp://www.wills-machine.comTel: 0086-411-83701520Fax:0086-411-83704610 Cylinder parts made by cnc machining