Flashback arrestor. Fuel gas. Regulator adaptor style. Prevent serious incidents caused by reverse gas flows or flashbacks. Designed to stop flashbacks by preventing ignition of mixed gases and to protect equipment such as hoses, regulators and cylinders. Color-coded for gas service to provide added safety (fuel gas/red). Internal check valves designed to prevent reverse flow and accidental mixing of oxygen and fuel gases. 22 PSIG (other fuel gases) maximum operating pressure. Rated capacity of 40 SCFH with 5 PSIG pressure drop. Regulator models provide downstream and upstream protection. 10 inch maximum cutting capacity. Reusable, manual resetting not required. Complete installation, testing and operating instructions included. Safe-Mate models feature quick connect design for quick and easy installation and disconnection.