Non-Rising Stem Gate Valve, Heavy Duty Service, 200 lb, Threaded Ends, Solid Wedge Disc, Union Bonnet, Gland Packed, Conforms to MSS SP-80. Type 1, Available Sizes (1/4" - 2"). Materials: Body, Stem, Bonnet & Wedge Disc: Bronze ASTM B 61, Seat Ring: Stainless Steel ASTM A240 TY304