Materials: M5: Housing plastic. Threaded insert: Brass, Seals: Nitrile rubber. Valve needle: Brass, nickel-plated. G1/8, G1/4: Housing: Zinc alloy. Seals: Nitrile rubber, Valve needle/inner part: Brass. Outer parts: Aluminium alloy. G3/8, G1/2: Housing: Aluminium alloy. Seals: Nitrile rubber. Valve needle/inner part: Brass. Outer parts: Aluminium alloy. Medium: Compressed air, filtered, lubricated or non-lubricated. Inert gases. Operating pressure: 1 to 10 bar (2 to 10 bar for M5). Operating temperature: 80°C max. (60°C max. for M5). Mode of operation: Flow regulator.