This is the replacement Dyson DC24 Pre-Motor Filter for the Dyson DC24 upright vacuum. Similar to the filtering performance and quality offered by the genuine DysonDC24 pre-motor filter, the Dyson DC24 Pre-Motor Filter retails at a much lower price providing consumers huge savings. OEM replacement part numbers: 913788-01, 913788, 91378801 The Dyson DC24 Pre-Motor Filter is washable and will fit the following Dyson DC24 upright vacuums: DC24 All Floors, DC24 Blueprint, and the DC24 Ball. Its highly recommended washing these filters every 3 to 4 months in order to maintain maximum performance and prolong the life of the vacuum. Make sure the filter is completely dry before reinstalling.