Isolating Ball Valve. Compact, high quality valve gives durability and secure isolation when activated Screwdriver actuated Nickel plated or Brass finish Manufactured from OT58 brass OT58 brass -chromium plated ball Chrome plated brass ball, encapsulated between two high grade NBR seals, gives smooth operation and 100% reliability BS 864 compression connections for ease of assembly Working Temperature: 85 C Max.