The Salco Products (TC4BCDI2SS0A) 4-Inch Ductile Iron Bottom Outlet Cap with 2-Inch Ball Valve is made out of ductile iron material with a 2-inch nitronic carbon steel plug, and a 2-inch threaded ball valve. It fits a standard 5-1/4-inch railroad thread for application to any car manufacturer's nozzle. Comes with 3/8-inch, carbon steel, chain with 16 links, a 4-inch, 304 stainless steel, lock ring, a 3/8 by 2-1/4-inch zinc plated carbon steel hex bolt, a 3/8-inch, zinc plated carbon steel, hex nut lock, 2 (two) 3/8-inch USS, zinc plated carbon steel, flat washers, and a 3/8 by 3-1/2 inch zinc plated carbon steel S hook. A broad range of gasket material options allows for use in various commodities, not included.