Dyson DC39 Animal, Mult-Floor Canister Vacuum Primary Washable Motor Filter, Generic for Dyson Part 923413-01 Premium Aftermarket Dyson Filter Designed in USA by Tidy Vacuums Washable and Reusable Primary Motor Filter for Dyson DC39 Canisters Located On the Top of the dust cup assembly. Cone Shaped, Blue Sponge type filter with blue plastic circular retainer Fits Dyson DC39 Multi Floor, DC39 Animal, Designed to fit Dyson OEM Part 923413-01