CycleOps, Aluminium training roller with resistance

02: Aluminum. Precision-lathed 3.25'' aluminum roller drums run silent and smooth, and won't distort in heat or sunlight. Designed for both indoor and outdoor use. 03: Aluminum with resistance. The same great features as our aluminum rollers, with the benefit of additional resistance. The unique patent-pending resistance unit uses zero moving parts to deliver 5 levels of quiet magnetic resistance. Patents issued and pending. Fold flat or stand on end for convenient storage.Brand: CycleOpsModel: RollersLength: 20.5Width: 6.7Height: 31.8Weight lb: 20.3Part Number: 9502Barcode: 012527002535