AfterMarket Carbon Filter 3-Pack for Kuhl and Kuhl+ series - L chassis models (KWCFL) Carbon filter 3-pack for Khl SL, YL and EL models More filtration than standard foam and mesh filters Captures allergens such as dust, mold spores, pet dander, dust mites and pollen Filters Measure 20x14.5x.2 Made in the USA BulkFilter Brand filter material