Union,3/4 In,NPT,Black Malleable Iron 1.Banded,Beaded,Plain 2.1/8-6" ... .Heavy/Standard/light weight Union, 3/4 In, NPT, Black Malleable Iron Specification:Union, 3/4 In,Connection NPT threads, Material of Construction ... Black Malleable Iron,WOG (PSI) 300 At 150 Deg F ...