Pressurized air duster removes dust and dirt from hard-to-reach places. Included extension tube allows you to reach tight areas. Nonflammable formula contains a nonozone-depleting propellant and no CFCs or HFCs. Moisture-free, oil-free duster will not leave residue on equipment or surfaces when used as directed. Duster is not for use on paper shredders or electrical motors because vapors may ignite.