... pipe used for high pressure valves.1,Material:Aluminum,alloy steel,brass,gray iron,ductile iron etc2,Investment casting,sand casting,permanent casting ... ,CNC drilling,CNC boring4,weight:0.2-60kg5,surface treatment:sand blast,electrophoresis,zinc plated6,Heat treatments:tempered or annealed,induction ... co.,ltdcontact person:AlbertP:86-574-87913612F:86-574-87913610 High Pressure Valve