HQRP Washable Pre-Motor filter for Dirt Devil F44#304019001 Replacement Upright Coaster HQRP&reg; Replacement Pre-Motor Vacuum Filter + HQRP&reg; Coaster; HQRP filters are washable and reusable! This PTFE filter is H12 filtration class and retains 99.95% of particles down to 0.3 micron. Filters should be changed every 3 to 6 months. 2 weeks DOA replacement warranty!