... , matt finishing, sandblast or pickling4.Connection: welded , threaded , clamped and union type.We also supply butterfly valve,ball valve,check valve ... ,diaphragm valve,safety valve,union parts,ferrule,end cap,nut,clamp,elbow,tee,cross,reducer,sight glass,manhole ... samples. If any requirments pls contact with us.quality control stainless steel investment casting machinery parts