Specification:Full socket, Half socket Surface Hot dipped galvanized,Cold galvanized, Black Size:1/2"-6" COUPLINGS / STEEL SOCKETS / STEEL MERCHANT COUPLINGMaterialCarbon steel,Stainless steel and AlloyStandardANSI B1.20.1, ASTM A733/ A53 /A106, ST37-2EN10241, BS1387, ISO7-1,DIN2999, DIN2986SpecificationFull socket, Half socketSurfaceHot dipped galvanized,Cold galvanized, BlackSize1/8"---6" ...