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

Price is good but too big for the filter so I recommend cutting it to fit the length. Also you should really buy the original hepa replacement once a year because it comes with the WHITE and the black filters that are meant for the filter to work well.

These were cheaper than the other filters offered by other sellers. I cannot say how well they work in terms of the activated carbon absorbing anything but it helps to be able to replace the outer filters when they become dusty. I put them in a 1 gallon zip top bag once I got them to keep them fresh (prevent the carbon from absorbing as much as it would otherwise). On the downside, although the width was correct, the filters are not tall enough so I have to cut one of the others to fill the rest of the filter area.

Was able to cut these up to fit in my Holmes hepa old air purifier. I cut these a little larger than the size the Holmes came with so they fit snugly and their are no leaks. The old Holmes is like new.

These work great! Its nice having the extra so I can just rinse off the dust and put it aside to dry and grab a dry, clean filter to use. Ive rinsed mine several times and they still work well. Yes, they are slightly larger but I havent altered them and they work just fine.

The HEPA filters can be expensive and this little layer not only removes any odors from the air but acts as a prefilter for dust. This is a multi pack and you simply peal off the old one (best done outside) and then stick the new one on using the velcro strips.

I developed a late in life allergy to my cats. So I bought two air purifiers that have filters. As we know, filters are ridiculously expensive. The air filters I bought came with these carbon covers so I immediately ordered this box of 4. I would say I change them every 6-8 weeks (at minimum) and so far I have been able to keep the filter clean enough that I have not had to change it yet!

This air filter is a quality item and works as specified.