CAPTAIN'S COMPASS Carbon Activated Pre-Filter 4-Pack for use with The GermGuardian FLT4100 Filter E for 3-in-1 Table-Top HEPA Filter Air Purifier Model AC4100

These filter replacements could not be easier to install. And they fit !

Works well and so easy to install. I use my filter 24 hours a day in my treatment room and it does its job well. I notice all the debris on the filter when I change them out.

I work in an old building and when I moved into a different office I immediately bought an air purifier. These fit perfectly and have really helped with the air.

Am told 3 stars means 'It's okay'...and the product from my perspective is barely that...dangling at the edge of useless. Price was great, though...have wasted money on considerably less useful products!

Not useful