HQRP Filter 4-Pack for Sears EF-1 EF1 86889 20-86889 2086889 40324 KC38KCEN1000 8175062 WPL4370417 53295 20-40324 2040324 KER-1800 471186 748167711864 20-53295 20-86889C Vac Vacuum Cleaner + Coaster HQRP&reg; Four Filters 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!