IJU1415 Features: * Safety super volume blo-gun * Maximum working pressure: 150 PSI * SCFM 23.6 @ 100 PSI * 1/4"" NPT * Nozzle thread size: 1/2"" 27 * Zinc alloy body * Aluminum extension * OSHA compliant * Special venturi holes in extension tube greatly increase air volume while maintaining OSHA required noise level and nozzle pressure of 30 PSI * Venturi holes allow air to escape if extension end is dead ended