Correct, a tankless compressor. The type sold for filling car tires or whatever. The one I have is pretty good considering the price, but I can't use it directly to run my blowgun. I have to fill my storage tank, and run the blow gun off that. The reason is, the compressor will go to 250 PSI, but it starts at Zero and works its way up. So if I attach the blowgun directly to it, I never get more than about 1 or 2 PSI (whatever pressure it builds up from friction going thru the hose). But, the compressor works very well for filling my 12 gallon air tank to 200 PSI, which then works very well for running my blowgun at 10-60 PSI (depending on where I set the regulator). Although used SCUBA gear is a good cheap option, you have to consider how often you are going to fill it, and how much that is going to cost you. Remember, if you pay $180 for a tank/compressor at Sears, that's it. From then on out, compressed air is more or less free (electricity to power the compressor, and maintenance costs). With a SCUBA tank, you might buy the tank and regulator for under $100, but you will pay for each refill (unless you know someone that has a 3000 PSI compressor... if you are friends with a fireman, ask if their department can do it, we do for friends and the occasional resident if they ask nicely, but then not all FDs have their own breathing air compressor, and fewer have the attachments for filling SCUBA gear) If you figure $8 each, your last $80 is used up in 10 fillings. Not to mention the time/effort/annoyance to have to fill it when it runs out at the worst possible time. But if you don't fill the bottle offen (those bottles hold a LOT of air at 1 atmosphere), then SCUBA might be the cheaper, and certainly quieter option. -chris <http://www.mythtech.net>