Eliminate dust, dirt and debris from those hard-to-reach areas and keep your expensive electronic equipment running longer. When used as directed, the duster is moisture-, oil- and residue-free. Includes an extension tube to reach tight areas. Not to be used on paper shredders or electrical motors as vapors may ignite. Capacity (Volume): 10 oz; Packing Type: Can; Refillable: No; Propellant: 134A Liquefied Gas.