Carbon Activated Pre-Filter 4-pack for use with the Germ Guardian FLT4825 HEPA Filter, AC4800 Series, Filter B By Complete Filtration Services

PRO: Can extend the life of your primary HEPA filter CON: (Not really a con, just an observation): Unless you put yourself on a schedule to replace this PRE-FILTER to extend the life on your HEPA PRIMARY filter, youre probably better off getting the combined product which allows for quick, clean, reliable replacement of BOTH filters at once.

Product arrived day before expected delivery. These prefilters are for my Germ Guardian Air filter. They are a tiny bit bigger and a little thicker but fit fine. Very happy with them.

These are nice and cheap, which is great, but before you buy these, try washing the one you have off under the sink. If you are careful, you can probably reuse the filter a few times.

Exactly what they advertised.

it came with the fold.

I bought this to go with the filter that it lists in the title but I had to cut it to fit the filter. Not completely compatible

These came in a plastic bag with holes punched in it. Carbon filters degrade when exposed to air. All the other brands I have purchased come sealed in plastic for storage until opened. I dont think Ill purchase this brand again, because there is no indicator that the filters are fresh when they arrive.

Fits as intended but feels a bit different than the stock one and doesn’t stick as well to the Velcro on the machine but works well

Can dust and within a day super dusty again. Bought this and have it running it has just about eliminated the dust. Dont have to dust for atleast a couple days now in between rather then every day

Should come in a roll and then you cut to height. The 1/4 inch mesh pr-filter was the right width but each was about 1/2 the height needed to fit on my primary filter. (took two). It would be nice also if they included a roll of double-sided 1/4 inch adhesive to adhere the pr-carbon mesh filter to the primary filter. Had to use some I had on hand.