This single-stage one-gauge regulator is designed to step the pressurised contents of a compressed gas cylinder down to a pressure that can be used in Oxy/Acetylene Cutting/Welding or Argon/CO2 Shielded MIG / TIG welding. Single chamber gas control Fits cylinders with vertical outlet valves One gauges display- Bottle contents and output pressure Pressure controlled by the centre dial Maximum outlet pressure 3.5 Bar Maximum inlet pressure 20 Bar Left hand thread BS EN ISO 25032009.