features and benefits: compact hand-held unit can be used anywhere with compressed air streamlined comfort fit and full volume control maximum working pressure : 150 psi maximum nozzle pressure: 30 psi when dead ended zinc die cast body safety blow gun meets osha requirements of special relief holes in nozzle which limits pressure to 30 psi when dead ended (static pressure). For use on regulated compressed air lines maximum psi 150. Many uses such as cleaning fuel and oil lines or air cleaners drying out wet ignition systems and spark plugs or blowing out dirt fillings and metal chips.