HQRP Filter Kit for Eureka Pet Pal 3271AVZ 3271BLU 3271BZ / Pet Lover 3276AZ 3276AVZ Upright Vacuum Cleaner, HF-7 DCF-21 Replacement Coaster HQRPreg; Washable Dust Cup HEPA Filter and Exhaust Filter + HQRPreg; Coaster; These filters is H13 filtration class and retains 99.99% of particles down to 0.3 micron. For optimum performance, change filters at least every 6 months. Compatible with Original filter; 2 weeks DOA replacement warranty!