3 Dyson DC17 10mm Belts, Part # 911710-01
These belts fit perfectly! They are 10mm. The number on the old belt did not match this number but fit perfectly. Have ordered other parts from Crucial Vacuum and have been very satisfied.
A Little Narrower than 10mm
Belts are not quite 10mm, more like 9mm, but they look like they will work just fine.
Quick delivery item was just as described very happy with purchase