2 Pack of 20x20x4 MERV 10 Pleated 4" Inch Air Filters by Glasfloss. Actual Size: 19-1/2 x 19-1/2 x 3-3/4

I needed a 20x20x4. I bought a couple of different brands that said they were 20x20x4. They were too thick and would not go into the the slot for the AC filter. Those filters cost $35 a piece so I wasted $70 because I tore the frame trying to force them in and couldn't take them back. So glad I found these because they fit! When you look at the actual size, these are a little under 4 inches thick. These are the ones I must have for my AC. I give these 5 stars. I need to order a few more to get me through the Spring and Summer season.

Within hours after installing the filter, I noticed improvement in the air quality in my house. I've used Filtrete brand for years with absolutely no complaints. I only bought the Glasflo brand because it was on sale as a bundle and Filtrete was out of stock for the size I need. Very impressed. I'll definitely purchase again.

Great filter! Fits perfectly and reduces allergens.

Goes in easily this is a hard to find size I can depend on Walmart to ale this size 20x20x4”

Bought these before and they work just great. Fast delivery and packaged well.

I have been buying these filters for over 3 years now and they are great. I hope I can continue every year with the same filters. Thank you!!

This exact size is often hard to find. The quality is great too. Though my unit calls for 20x20x4, that is actually too large. These fit perfectly.

Very handy to use.

Great snacks

Cheap and smaller than supposed to be