POWERTEC 70333 Dust Collector Bag, 21" x 31", 1 Micron Filter, For JET, Grizzly, Shop Fox, Wen, Harbor Freight, and POWERTEC DC-1512

Arrived in 2 days I think ... I just purchased a 2 hp Harbor Freight (5 micron) dust collector to replace my 1 hp Grizzly. I was concerned about the fit and how performance might be affected going from 5 microns to 1 micron filtering. Fit was fine. The bag seems much thicker than the standard HF bag. Good quality too.re: CFM / suction, I did a very unscientific test by seeing how effective an open, horizontal pipe would hold a package of sandpaper. With the 5 cfm bag, it would barely hold the package with 3 sheets. With the 1 micron it also barely held the same package of 3 sheets. Neither would hold 4 sheets and easily held 2 sheets. So, for me, not a lot of difference in suction / cfm. I was happy with that. How's that for hillbilly testing? ;-) See photos.

Great upgrade from the 5 micron unit that came with the dust collector initially.Price was very good.

This filter fits my Harbor Freight Central Machinery, 35-gallon dust collector. It is thick and well-made. I can't attest to how small dust particles it can filter out, but it seems to work well in my shop. It is easy to install and can be pressed down when not in use to save space.

It fit well, a little thicker than original filter, used old clamp over, took my time (not long) to a line up and when turned off the bag is held up by Harbor Freight hook. On my set up I can hear a different tone when running, this is no big deal it works good.

Nice thick felt upper bag.This bag is perfect. With a plastic lower bag on my 2hp single stage delta 110v dust collector I don't need to run my air filter nearly as much as I use to. Bag is thick and traps dust! I can't even tell there is dust in the air. Has probably saved my lungs in a small basement woodshop

Fits the harbor freight collector fine and works well. Pleased so far.

I had a 30 micron bag on my dust collector (Delta 50-850). With the 30 micron bag I was constantly getting a very fine coat of dust on everything in my entire shop, very annoying and very unhealthy. With this new dust bag, as you might expect, I no longer have that problem. In fact, so far, I have not had any dust at all, at least not any that I can detect. I haven't used it enough just yet to make a final judgment but so far I'm impressed. A couple of things to note; this bag is thick so the metal band that latches down to hold the bag onto the separator is a little difficult to close, but it does close. The other thing is the bag is a little shorter than the original bag. I used a D-ring to connect it to the support rod to make up the difference in the height of the bags and it works well.

A huge improvement over most! Heavy duty! It stays fully inflated after shutdown, as opposed to other brands using thinner materils which collapse in on themselves when not actively in use. Good sturdy straps on the top and the base which makes life easier when changing out or cleaning. It's also a 1 micron filter which should be a big improvement over the standard 5 micron filter bags which tend to leave a fine mist of dust covering every exposed surface and tool in your shop.I'm using my bag on a HF dust collector, and it's a great fit! I would recommend this filter to anyone looking for a better than stock replacement for their dust collector bag.