Not a fan of the vacuum they were designed for so I probably have an unfair rating but they fit, seem to spin well etc but not many have been picked up. Not sure if it was a brush or a vacuum but I returned the vacuum and gave the brush to someone else. There was a lot of lint stuck in BUT my dog also nibbled on his toy and all the fibers got in that I didn't even know about. There seems to be a lot of stuff stuck to the bristles. Again, it could be the vacuum itself. Just note that once opened, you cannot return them.