... specification:1/8'' - 4''2. material: AISI 304, 3163. widely used in hose connectingQiancheng Stainless Steel Products Co.,Ltd, situated in foundry country ... wax-molding fine technique, could produce all kinds of stainless steel and carbon steel pipe fittings,including couplings, nipples, valves, elbows, tees, ... operate with us on mutual business relationship base. dn 40 stainless steel 304/316 ball