Description : 40140201 Pleated long-life HEPA replacement filter. Fits any Hoover bagless upright vacuum with Twin Chamber System. Traps 100-percent of dust mites and 99.8-percent of ragweed and common grass pollens. Replace every 3 to 6 months or as needed based upon usage. Measures approximately 8 by 8 by 14-2/5 inches.