ZVac Dyson DC24 (4 Pack) Washable Pre-Filter 913788-01 Dyson ZVac DC24 Pre-Motor Filter This is the replacement Dyson ZVac DC24 Pre-Motor Filter for the Dyson DC24 upright vacuum. Equal to the filtering performance and quality offered by the genuine DysonDC24 pre-motor filter, the Dyson ZVac DC24 Pre-Motor Filter retails at a much lower price providing consumers huge savings. OEM replacement part numbers: 913788-01, 913788, 91378801 The Dyson ZVac DC24 Pre-Motor Filter is washable and will fit the following Dyson DC24 upright vacuums: Dc24 All Floors, DC24 Blueprint, and the DC24 Ball ZVac recommends 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.