black/galvanized chinese fittings Certificate:ISO ,BSI Surface:Black and Galvanized OUR PRODUCTS RANGE MaterialMalleable casting iron ... Socket, Nipple, Plug, Cap, Nut, Union, BushingSurfaceHot-dipped galvanized, Normal black, Shining blackGradesHeavy series, Standard series, Medium series, ... and oil pipes or for many other fluids1.OursWe are manufacturer of malleable iron pipe fittings with self- ...