Slotted venturi tip prevents pressure buildup. Venturi effect draws more air than standard blow guns. 1/4” NPTF Inlet and 1/8” Outlet. This safety blow gun has a safety tip which prevents buildup of tip pressure in the event the outlet is obstructed or “dead ended”. In compliance with OSHA 1910.24b and 1910.95 requirements when used on an air line of 150 PSI or less. Use personal protective equipment, safety goggles, chip guarding barrier screens and ear protection.