... dipped galvanized,electric galvanized,bake galvanized,black heavy type,light type SZ is our brand. The "SZ" brand malleable iron pipe fittings ... :malleable ironSize:1/4-6inchSurface:Hot dipped galvanized,electric dipped galvanized,bake galvanized,black;with ribs and without ribs.Standard: ... .Certificate:ISO9001:2008FrankHebei Wanda Malleable Iron Corp.,Ltd Galvanized Iron pipe fitting tee with rib