banded,beaded,plain hot dipped galvanized,electric galvanized,bake galvanized,black heavy type,light type SZ is our brand. The "SZ" ... brand malleable iron pipe fittings are widely used in various pipelines to convey gas,water,oil and so on.Our ... /4-6inchSurface:Hot dipped galvanized,electric dipped galvanized,bake galvanized,black;with ribs and without ribs.Standard:BS standard,DIN standard ...