Safety blow gun with super volume comes with an OSHA compliant safety nozzle so air flow will drop below 30 PSI when dead ended. With a 1/4" NPT and nozzle thread size of 1/2" - 27, this super volume safety blow gun is made of Zinc Alloy. With a maximum working pressure of 150 PSI, this blow gun offers 23.6 SCFM at 100 PSI.