Dual Action filtration plus attached carbon odor reducing filter, replacement for Honeywell G Filter (HRF-G2) Filtration captures up to 99.97% of particles as small as 0.3 micron from the air including smoke, dust, pet hair and dander, mold spores, and dust mite debris Attached carbon pre-filters reduces VOCs and household odors such as pet and cooking odors Compatible with Honeywell HPA020 Series and HPA030 Tower Series Air Purifiers; including HPA020B, HPA030B (HRF-G1) 2 pack, filter dimensions: 5" W x 10" L x 1 3/8" D Filter-Monster branded replacement filters, compatible with Honeywell HPA020 series and HPA030 tower series air purifiers; including HPA020B and HPA030B (HRF-G1). Filter-Monster uses filtration to capture up to 99.97% of airborne allergens and pollutants as small as 0.3 microns in size, including smoke, dust, pet dander, mold spores, and dust mite debris. The attached activated carbon pre-filters help to capture larger particles and extend the life of the filter, as well as reduce VOCs (volatile organic compounds) and odors from the air. Set of 2 filters. Each filter measures 5" W x 10" L x 1 3/8" D. Fits Models Honeywell Air Purifiers: HPA020 Series and HPA030 Tower Series, including: HPA020B *, HPA030B **. (HRF-G1) * HPA-020 Series requires 1 filter. ** HPA-030 Tower Series requires 2 filters. Replace once per year depending on use and environmental conditions.