Rising Stem Gate Valve, Heavy Duty Service, 300 lb SWP - 1000 lb WOG, Threaded Ends, Solid Wedge Disc, Union Bonnet, Gland Packed, Conforms to MSS SP-80. Type 2, Available Sizes (1/4" - 3"). Materials: Body, Stem, Bonnet & Wedge Disc: Bronze ASTM B 61, Stainless Steel ASTM A240 TY304