This is a Washable and Reusable Dyson DC07 DC-07 Pre-Motor Filter by Crucial Vacuum. This Pre-Filter fits ALL Dyson DC07 Vacuum Cleaner Models and replaces Dyson Filter Part # 904979-02, 90497902. Wash filter every 3 to 6 months for optimum performance. Let the filter completely air dry for at least 48 hours before inserting it back into your Dyson Vacuum Cleaner. This filters is absolutely essential for allergy sufferers! Designed and developed in the USA by Crucial Vacuum. All vacuum brand and model names are registered trademarks of vacuum manufacturers This is a generic product designed and engineered in the United States by Crucial Vacuum. This is not a Dyson® OEM product and is not covered under any Dyson® manufacturer's warranty. Please check your manufacturer's warranty with regard to the use of non-OEM parts. The Dyson® brand names and logos are the registered trademarks of their respective owners. Any use of the Dyson® brand name or model designation for this product is made solely for purposes of demonstrating compatibility.