3M 501 Filter Retainer Lot of 2

Snaps right in place and holds the pre-filter just as described.

Safety Equipment is one of those things we want to protect ourselves. The quality of this product is great for my needs. The price is right with the standard of others.

There are many imitators, but the 3M brand is the one that fits the best. It is actually probably a little “over snug” in fit — it can be a little difficult to put on, and a even more difficult to remove.I have four non-3M brand covers that came as part of a mask and filter cartridge packages which I use for non-critical filter situations. Only one of those covers stays on, the other 3 sets fall off if bumped — not good if your pre-filter drops in dirt, dust, sawdust, paint, etc.When it matters, stick with the 3M brand covers and filters. No, I don’t work for 3M, but I do trust their products the most. :)

Wether you use it on a dust filter or as a pre filter on a cartridge,, it does a great job.

Cheap and works okay. Best way to use N95 filters for days.

Had others that keep falling and cracking, this gray or grey unobtainium material they use is pretty good.

These held the filter packs perfectly.

I had ordered a pair of filter retainers and was waiting for it to arrive. The package became late and soon appeared to be lost, so I contacted the seller. They were really kind, professional and seemed just as confused as me.My guess is due to the pandemic being a lot harder on the mail system, the package ended up caught in the mix. But thats ok, as thats to be expected in these times. The seller agreed to send me a new retainer and it arrived quickly!The package was well insulated and had no scratches or damage what so ever. It clipped onto my cartridge just fine and was an excellent fit!Def cool people :3