This 1-year supply of the Honeywell HEPA filter R helps capture up to 99.97% of microscopic allergens, 0.3 micron and larger; and carbon pre-filters A effectively deodorize the air and trap larger particles such as dust, lint, fibres, and pet hair & dander. Enjoy the many comforts associated with surrounding yourself with a pristine breathing experience all year round. These genuine Honeywell filters fit model series: HPA300C, HPA304 series, HPA3300 series, HPA5300 series, HPA5350BC, HPA8350 series. This filter kit includes 7 filters: 4 pre-filters + 3 HEPA filters.