The Capri Tools High-Performance Air Blow Gun utilizes venturi nozzles to deliver airflow at 72 cfm. During normal operation, the venturi nozzle draws in air and multiplies airflow. Should the nozzle tip become blocked, air pressure is released to lower than 30 psi, meeting OSHA’s output pressure safety standards. Airflow level is controlled by turning the flow control knob, conveniently located above the handle. The air blow gun is constructed with a durable aluminum body, premium matte finish, and features an easy-to-operate ergonomic contour soft grip and heavy duty trigger.