When looking for spare parts for our Roomba we could not find better prices. When it came time to swap out the parts, we put in the brushes and the Rumba started immediately, then stopped and gave the error "clean brushes". We fiddled with the brush body, deep cleaning, etc., then sent it back. Same mistake. We found something online that recommended removing the yellow part on the sides and it worked. But not as good as original parts. Our canister was full after the rumba ran, it's barely noticeable by comparison, but I run a normal vacuum and the canister fills up, so I know it's missing a lot of stuff that used to be used to collect original parts. Wouldn't recommend these.