Oral-B iO 3/4/5/6/7/8/9/10 Series Ultimate Clean Electric Toothbrush Replacement Brush Head for Oral-B iO Electric Toothbrush, Pack of 10 (Black)

These fit very well and are a great inexpensive replacement for the name brand. The bristles are nice and soft, as well.

This gets the job done, but at a fraction of the cost. I feel that they are just as good as the original since they hold up fine after using it for a long while. They also feel just as good in the mouth, and I feel that it is getting my teeth just as clean as the original brushes do. They fit perfectly on the brush head, and feel great in my mouth. They are also just as easy to install on the brush base as the originals. To make it even better, each brush head comes with its' own cover that is also easy to take off and on. These are a must!

They work really well I could hardly tell any difference from the namebrand in this brand so I will be buying again

While they do fit my IO9, there is a gap between the brush and the body of the IO9. Water and toothpaste build up in the gap and leak out during the day, leaving residue on the bathroom counter. Otherwise, the performance is OK, but not as good as the Oral B replacements.

Make noise, not as snag as the brand