... black/galvanized malleable cast iron pipe fittings: Threaded:ISO7/1, DIN2999, NPT Size:3/8", 1/2" --- 6" OUR PRODUCTS RANGE MaterialMalleable casting iron ... , Cap, Nut, Union, BushingSurfaceHot-dipped galvanized, Normal black, Shining blackGradesHeavy series, Standard series, Medium series, Light ... other fluids1.OursWe are manufacturer of malleable iron pipe fittings with self-management export power ...