Duster delivers a blast of compressed air for an effective efficient cleaning method for hard-to-reach or sensitive areas. Keep your electronics clean. The Blow Off Air Duster is an all-purpose sterilized cleaner that removes dust dirt and microscopic debris from hard-to-reach places in computers and electronic devices. It also prolongs performance and longevity and is ozone safe. • Double-filtered compressed ozone-safe inert gas. • Application straw is mounted to pivot spray head. • Improves accuracy to allow fast precise removal of hard-to-get dirt dust contaminants. • Drip- moisture-free propellant. • 10 oz aerosol. • Sold as 1 Each.