... :Full socket, Half socket Surface Hot dipped galvanized,Cold galvanized, Black Size:1/2"-6" COUPLINGS / ... ISO7-1,DIN2999, DIN2986SpecificationFull socket, Half socketSurfaceHot dipped galvanized,Cold galvanized, BlackSize1/8"---6"GradeHeavy series, Standard series, ... SCH160; CLASS A, CLASS B, CLASS CSurfaceHot Dipped Galvanized, Electro Galvanized, Natural finished, Chemical blackThreadsDIN, BS, NPT, ...