HQRP 2-Pack H13 Filter for Eureka Boss 2270AT 2270B 2271A 2272AV 2273AV 2275AZ Upright Vacuum Cleaner, HF-7 Replacement Coaster HQRP&reg; 2-pack Filters plus HQRP&reg; Coaster; This glass fiber paper filter is H13 filtration class and retains 99.99% of particles down to 0.3 micron. For optimum performance, change filter at least every 6 months. Compatible with Original filter; 2 weeks DOA replacement warranty!