The Skuttle USK448-3O is the correct replacement air cleaner filter cartridge for the following systems:
Skuttle USK448-3O Air Cleaner Filters can be used on air cleaners that require 20" x 20" x 5" media filter cartridges. The Skuttle 448-3 is an effective air filter media that markedly reduces airborne particles such as pet dander, pollen, mold spores, dust, dust mites and other allergens from indoor air in your home or office.
Skuttle USK448-3O Air Cleaner Filter Specifications:
Replace Skuttle air filters every 3 to 6 months regularly for peak efficiency and performance.