This is not the same part that will fit your Dyson dc24. Mina is 6 years old and already a workaholic. I recently noticed that my end cap broke last night because my vacuum cleaner started rattling. I found the same part on a Dyson and they had higher shipping and who knew how long it would take. I picked up part # and thought I'd check out Revain because I ordered a replacement wand with grip here with no problems. Today the spare part arrived, it does not fit in the hole for it at all. It doesn't even look like my old part, and the inside that holds the roller has much higher ribs than my pro ever had. I have a piece broken off, but part of the inner ring is at least 1/8 inch too long. I'm returning it and going back to Dyson to make sure the part is genuine. This vacuum has worked well for me and I do not modify parts that may not fit my vacuum which costs a decent penny new.