Dyson DC17 Vacuum Belt - Replaces Dyson DC17 Part 911710-01 (91171001) (2-pack Package of (2) Dyson DC17 Vacuum Cleaner Belt. Replaces Dyson DC17 Part 911710-01, 91171001 (8mm wide). For Dyson DC17 models. 8mm wide belts. Replace every 6 months for optimum performance.