Hoover HEPA Final Filter, 40120101 This hard-frame pleated HEPA filter replaces foam-type filters for self-propelled WindTunnel upright vacuums. The filter measures 10-7/16" x 3-5/16" x 1/2", has a black frame and is a filter made with HEPA media. The filter fits inside the filter door on the side of self-propelled WindTunnel uprights including but not limited to U64019RM, U6420900, U6434900, U6436900, U6454900, U6471900. Filter made with HEPA media. HEPA media traps 99.97% of dirt, dust, and pollens down to 0.3 microns, for cleaner air than standard or allergen media.