... be customized2.Materials: AISI304,AISI304L,AISI316,AISI316L3.Surface treatment: Mirror polishing(180G,240G,400G), semi-polish, matt finishing, sandblast or pickling4 ... valve,ball valve,check valve,diaphragm valve,safety valve,union parts,ferrule,end cap,nut,clamp,elbow,tee,cross,reducer, ... samples. If any requirments pls contact with us.quality control stainless steel investment casting machinery parts