[Offy 220]

Russcc, Binkman34 suggested Harbor Freight and it is probably the cheapest around but I found another suggestion on other automotive - body work forums. I have been purchasing "coal slag" from White Cap Industrial Supply for the past few years and it works great for the price. I use it in my glass bead cabinet and hardly any wear on the nozzle and tip. I have used it on engine parts, misc. sheet metal and body parts.