... rich assortments:banded,beaded,and plain;galvanized and black;with ribs and without ribs;heavy and light...Material:malleable ... :Hot dipped galvanized,electric dipped galvanized,bake galvanized,black;with ribs and without ribs.Standard:BS standard,DIN standard, ... American standard.Certificate:ISO9001:2008FrankHebei Wanda Malleable Iron Corp.,Ltd Galvanized Iron pipe fitting tee with rib