OSHA Approved Multi-Function Blo-Gun Comes With Both A Safety Extension And Nozzle Tip, Rubber Nozzle Is Curved To Access Hard To Reach Areas Such As Engines, Transmissions, Combines, Machinery And Concealed Areas, Maximum Working Pressure: 150 PSI, OSHA compliant with safety tip only. SCFM: 10.5 @ 100 PSI with safety nozzle; SCFM: 11.6 @ 100 PSI with rubber tip. Air inlet 1/4" NPT.