3 Dyson DC17 Vacuum Belts - Replaces Dyson DC17 Part 911710-01 (91171001) Package of (3) High Quality, Long-Lasting Replacement Dyson DC17 10mm Belts. For use on DC17 models . Dyson DC17, Belts 3-Pack Replaces Part #911710-01 You get your belts FAST you will need the spares in the future anyway! Replace this belt every 6 months to ensure optimum performance.