Filter-Monster Branded Replacement Pre-Filter Pad Pack Compatible with IQAir PF40 Coarse Dust Pre-Filtration Kit, 5-Pack

Great pre filter to extend the life cycle of other expensive IQ Air filters.

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fits perfectly GREAT PRICE FORPRE FILTER FOR, AIR IQ PRO.

I have expensive air purifiers and found out the charcoal filters and drums cost as much as a new machine. I really that I can cut these and put them in place of the actual items and it does filter the air.I will definitely bought some again on the future.

It was fine looks just like the one that I bought direct from the company!

As another reviewer has said, these are thinner than the one made by IQAir. They also don't seem to have a rough side as do the ones made by IQAir. I did purchase another generic brand before, and they were better.

As I opened the package, I noticed the filter is not made like the others I have used. They are flimsy, even though I know they are supposed to be that way, but the finish on one side is basically the same as the other side. The originals have a different texture thus, a more efficient filter. I also find the offbrands such as this one are always a 1/4 inch off on the sides meaning it doesn’t cover the bottom of the air filter.

This product is much thinner than what I had hoped. It is not equivalent to IQ Air filters, which explains why they are cheaper.