Gentec QC-HTPRSP pair of quick connectors provide fast, reliable, and easy setup for welding, cutting, and soldering applications. They provide pressure tight connections in seconds. Built-in automatic check valves prevent the reverse flow of gas by cutting off the gas under back pressure. Oxygen and fuel gas models are not interchangeable to avoid misconnections. Pair comes with QC-RHF (fuel) & QC-RHX (oxygen). The gas must be switched off in case of interruptions on regulators. Colour coded for fast, efficient and safe handling.