The CO2 cartridge may be small but it is certainly mighty. The thumb-sized apparatus can deliver a good whack of gas in just a few seconds and be a serious life-saver in sticky situations. After all, ...
I tend to go through a lot of cans of air duster when cleaning computers, optical media, etc. The cheapest I can find are the Fellowes 'Air Duster' (1,1,1,2-Tetraflouroethane) for about $5 at Wal-Mart ...
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