HEBEI GAIN TRADING CO.,LTD” is the subcomany of Hebei Wanda Malleable Iron Corp.,Ltd ,which was established in 1997. We are leading & professional exporter & supplier of the registered “SZ” Brand malleable iron pipe fittings, our products can be used in various pipelines to convey gas,water,oil and so on.It is of rich assotrments:banded,beaded,plain;galvanized and black;heavy type and light type.Size is from 1/4 to 6 inch.Standard:BS Standard,DIN Standard,American standard.