+1 for Wynn though they're less than 20 miles from me. I have a spun bond filter on a "2 h.p." dust collector with Thien baffle. One nice thing about the spun bond filters is that they're washable at garden hose pressures. I've tapped and vacuumed and tapped and vacuumed and still when washed there's quite a bit more dust that comes out.