OS&Y Gate Valve, UL listed and FM approved, Solid wedge disc, Bolted bonnet, Gland Packed, 175 lb WP WOG, Flanged ends. Materials: Body, Bonnet & Wedge: Cast iron ASTM A 126 Class B, Stem: Silicon Brass ASTM B98, Packing: Non-Asbestos, Seat ring & Wedge face ring: Cast Bronze ASTM B 62.