... ,Material:malleable cast iron5, Size:rang from 1/4*1/8"" to 6"*5"6, Surface finish:hot dipped galvanized,electric galvanized,bake galvanized,black7 ... quality control13,working pressure is 1.6Mpa, test pressure is 2.4Mpa14,Divided into 3 series:heavy,light,middle Hot dipped galvanized iron pipe fittings ...