4YourHome Washable Reusable Pre Motor Hepa Filter Designed to Fit Dyson DC27 DC28 Upright Vacuum Compare to Part# 919780-01 High quality replacement hepa filter, compare to Dyson Part# 919780-01 Captures particles down to 0.3 microns and beyond - including mold, bacteria and pollen! Filter should be washed at least once every 3 months to maintain optimal performance of your vacuum. Fits Dyson DC27 / DC28