Vacuum Fix Brand Dyson DC17 Vacuum Belt - Replaces Dyson DC17 Part 911710-01 (91171001) Package of (1) High Quality, Long-Lasting Replacement Dyson DC17 8mm wide belt. Replaces Dyson part number 911710-01. For use on DC17 models that use the 8mm wide belt. Replace this belt every 6 months to ensure optimum performance.