CFS – Pack of 1, Universal Cut to Fit Carbon Pre-Filter Pad Roll for Air Purifiers, Furnace Filters, & Air Conditioner Filters – Fresh & Filtered Air for Indoor – Charcoal Air Filter Sheet – 16"x48"

Works well for filtering toxins / dust in our RV

The only thing was, it was to thick do the temperature sensor couldn't ready the actual incoming air temp. I even used part of it for the cat litter top filter.

Dimensions are not accurate! I purchased the 16x48 inch filter roll. What a received was a little SHORT! It measured 15 15/16 x 47 inches. Not a big deal for my application, but it might be for others. Make sure you have extra when ordering since they seem to be using s SHORT ruler! Overall, it does appear to be of good quality, just a little short, so I only subtracted 1 star from the rating.

Air purifiers have gone up a stupid amount, like so many other things. We were about to just go without having one, but I wanted to make a last ditch effort to find filtration media we could cut to fit our old model. It cut easily with scissors and wasn't difficult to press into place. Triple-layering this makes for very clean smelling air and an easier rinse of each layer as needed. Now we have it running in our nursery 24/7 and we're all breathing easier. We'll be back to buy more! Thanks!

This was great, just what we wanted for our window air conditioner unit, we wanted to make sure that there was an extra filter one of our pets has asthma. So far this has been great, no smell, can cut the item to fit the size of the unit. This is also easy to clean and I feel like it's a great product, thick material.

I could find a pre-filter to fit my 20 yr old air filter so bought this. It works as promised and was easy to cut to size.

Not very good

I use it for a wick. Never burns up.