This is a replacement roller brush, or beater bar assembly designed to fit the Eureka / Electrolux Oxygen Canister Vacuum Cleaner model EL6988E, EL7020B, EL7020BZ, EL7024, EL7024A, EL7055B, EL7055BZ, EL7060A, EL7061A, EL7061B, EL7066A, EL7070, EL7070A,  This brush comes fully assembled, and ready to install, and includes all components of the brush roller, including the core with the bristles, both bearings, and both end caps.  Genuine Electrolux 61699-2.