This blow gun has full flow control with OSHA compliant safety nozzle. Air flow will drop below 30 PSI if nozzle is dead ended. This safety lever blow gun offers a 1/4 NPT air inlet and a maximum pressure of 150 PSI. Product Features:1/4 national pipe thread air inletMaximum working pressure of 150 pounds per square inch10 standard cubic feet per minute at 100 pounds per square inchThread nozzle measures 7/16-27Zinc Alloy body