HQRP Filter 4-Pack for Hoover U5174900 5174900 U5176950 5176950 U5177900 5177900 U5179900 5179900 UH40155 H40155 Fold Away Upright Vac Vacuum Cleaner Coaster HQRP&reg; Washable & Reusable Hepa Filter plus HQRP&reg; Coaster; This filter is HEPA filtration class H12 and retains 99.97% of particles down to 0.3 micron. 100% Compatible with Original filter; 2 weeks DOA replacement warranty!