Sprinkler-Control Valve Indoor/Outdoor, Butterfly Valve, Full Port, Rating 175 PSI, One Piece, Threaded Ends, Slow opening and closing, Quarter turn operation, Water Hammer Elimination, UL Listed & FM Approved, With Position Indicator and Supervisory Tamper Switch Assembly, Available Sizes (1" - 2 1/2"), Materials: Body: Bronze ASTM 584 UNS C8440, Disc: Stainless Steel ASTM A276, Type 304.