Union nut Specification: DN10-DN150, 1/2"-6", larger size can be customized Materials: AISI304, AISI304L, AISI316, ... : 2008, CE, TUV certified) Specification: DN10-DN150, 1/2"-6", larger size can be customized Materials: AISI304, AISI304L, AISI316, AISI316L ... valve, check valve, diaphragm valve, safety valve, union parts, ferrule, end cap, nut, clamp, elbow, tee, cross, reducer, sight glass, manhole ...