... Part,Filter body,Valve body. GG20,GG25,GGG40.Green sand or Resin sand technic.Machined casting part.Shot blast surface. Features ... Par,Filter body,Valve body: 1.Material :GG20,GG25,GG30 or GGG40.2.Unit weight:10kgs,25kgs,35kgs,55kgs,98kgs,150kgs ... detector,mechanical properties inspection.6.Surface treatment:shot blast cleaning or powder coating surface.7.Machining machines:CNC,NC lathes,NC milling ...