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

This is the best value for the pre-filters Ive found.

Great product delivered quickly at a great price.

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.

Was a little thicker than the original filter that came with air purifier. Hopefully it doesn’t effect the function of motor or fan. I just installed it so not sure.

I honestly didnt even know what these were when I got them. Now I know they make my filter last 4x longer. Nothing touched the filter with these pre-filters properly installed and changed regularly.

I have used these filters for years. They came with my air purifier and work so well, I see no reason to change.

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.

Just what I was looking for my air purifier it was easier to find on here thank you

Works great in the air filtration unit but cannot be blown clean or washed. Must be replaced. So in the long run may be a little pricey

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