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