Blow Off Canned Air Duster is an essential tool for maintaining all of your electrical equipment, from your keyboards to your currency counters to your fax machines.. Each can is 10-oz. Sold in 12-packs. Blow Off Duster specially formulated to clean computers and electronics to prolong performance and longevity. 10oz can, non-flammable all purpose sterilized cleaner that removes dust, dirt and microscopic debris from hard to reach places. This product contains a bitterant to help discourage inhalant abuse. 100% ozone safe, contains no cfcs, hcfcs, propane or butane.