Inlet 21.8mm LH - German, French and others European gas bottles Regulator itself have 1/4" thread on both sides. High Pressure LPG Gas Regulator 1–4 Bar Adjustable | 10kg/h | Serie OC52 Professional high-pressure LPG gas regulator designed for propane and butane gas applications. The Serie OC52 / OC52.203 regulator features adjustable pressure from 1 to 4 bar and a high gas flow capacity up to 10kg/h, making it ideal for commercial, industrial, heating, burners, roofing, foundry, catering, camping, forge, and workshop applications. Manufactured in durable zamak metal construction, this regulator ensures reliable gas pressure control and long-lasting performance. Application: High pressure gas systems Suitable for: Burners, heaters, roofing torches, furnaces, catering equipment, camping an