5N11 Particulate Filter Compatible with 5P71, Installed on 501 Filter Retainer Replacement for 6200 6001 6800 7000 (10PCS)

I think it's funny that a boatload of people bought these thinking they were 3M products. They're sold as a third party. And of course they're made for the Chinese market. Their low price reflects that. In my tests, these prefilters blocked 90-95% of particulates, which is perfectly acceptable. They're made using similar techniques to the 3M version. Of course, the prefilters I received had "scary Chinese heiroglyphics" on it. And that's scary. /sIn short if you think this is a scam or a knockoff product, you need to learn how to look at images and read descriptions.

need them and they work

I was surprised that I could get these filters during the Covid Pandemic. When I did they work perfectly and I will order more from this supplier.

As good as the original

Good

Very easy to use, and fits perfect in breathing mask. Thank you again for your product.

👍

This is the second time I have ordered these filters. They work well and cost is good.