banded,beaded,plain hot dipped galvanized,electric galvanized,bake galvanized,black heavy type,light type SZ is our brand. The ... to convey gas,water,oil and so on.Our products are of rich assortments:banded,beaded,and plain;galvanized and black; ... ...Material:malleable ironSize:1/4-6inchSurface:Hot dipped galvanized,electric dipped galvanized,bake galvanized,black;with ribs and without ribs.Standard:BS ...