BRUSHROLL RAINBOW R-1866 REPLACEMENT Rainbow Canister Vacuum Cleaner Original Rexair Power Nozzle Roll Brush. Fits D3, D4, SE, D3C R-1650C, D4C 2800C, D4C SE R-4375C. This Roll Brush Is The One Where The Belt Rides On The End Of The Roll Brush (not center) . Complete Roll Brush With Both End Bearing Caps. 14 Inches Total Length. Fits Models: 1650, 2800, 4375 79-3400-98 R-1866