HQRP H13 Filter compatible with Eureka HF-7 fits WhirlWind Plus 3279AZ, 3277AVZ, 3277AVZX, 3282AVZ Upright Vacuum Cleaner Coaster HQRP&reg; Filter plus HQRP&reg; Coaster; This glass fiber paper filter is H13 filtration class and retains 99.99% of particles down to 0.3 micron. 100% Compatible with Original filter; 2 weeks DOA replacement warranty!