Info for My Bestest friend Donald! ~~~~ Air. Natural and harmless, right? Yesbut "canned air"? It can be a completely different beast with components that can leave a residue on your lens, camera, film...or worse. American Recorder Technologies (ART) has a different idea. Remember the little CO2 cartridges that put the fizz in seltzer? ART plugs them into a dust gun. Claimed to be environmentally safe and more powerful than traditional aerosol dusters, the residue-less CO2 cleaner is also said to be nonflammable. (It can be fatal if breathed exclusively, so keep these cannisters away from kids.) Each 3.5 gram steel CO2 cartridge is recyclable and good for over 150 half-sec bursts. The reusable gun and three CO2 cartridges cost $20, and CO2 refills are $7 for six cartridges.....Gets rid of Dust...no Sniffing now....Insane Grin