4 ft long blow gun is perfect for cleaning hard to reach areas in cars, tractors, combines and many other applications. Blow gun includes safety tip and rubber tip. Maximum working pressure: 150PSI. Maximum working temperature: 175F. Zinc alloy body, aluminum extension, stainless spring, synthetic washer. Only the safety brass nozzle confirms to OSHA standard and the dead-ended pressure is less than 30PSI. Flow 10.5SCFM @100 PSI for safety brass nozzle. Flow 11.6SCFM @100 PSI for non-safety rubber tip.