Compressed Air Cans for Cleaning Systems

[64squares]

I use those dust remover spray cans for blowing out dust in systems and they work good, but the thing is they're very pricey and they don't last long. The cheapest I can find them for is $5 a can for 10 oz. Anybody know of a place to get them in bulk for cheap? Thanks! Michael

[FABombjoy]

I've gotten them 3 for about $10-11 at Sam's Club. Can't remember the size offhand, but I'm pretty sure they're more than 10oz (cans are about 8" tall).