... polishing(180G,240G,400G)Shape: round or hexagon typeA completed union was composed of nut,liner,male,seal ring. We ... butterfly valve,ball valve,check valve,diaphragm valve,safety valve,union parts,ferrule,end cap,nut,clamp,elbow,tee,cross,reducer ... engineers.Device: YODSN combined CNC turning processing, CNC milling center, plastic injection, Die casting, press stamp, we introduced plenty of advanced ...