Pressure rating: 1500 / 2500 (4500) lbs, B160 - B500 (B760). Size range: 2 1/2 - 4 Inch. Body materials: (S)A105N, (S)A182-F22, (S)A182-F91, (S)A182-F92, (S)A182-F316(L). End connections: BW. Features: Pressure Seal Bonnet. Manufacturer: China Topper Forged Valve Manufacturer Co., Ltd. Sales Contact: Jeasin Lee Sales email: valvesforged@uvalves.com