Cheap and don't fit properly
I bought these for a Braun Oral B toothbrush.  Never again!  They don't fit properly - the O-ring at the bottom does not seal the heads to the toothbrush body, so a lot of water and toothpaste get trapped under the head, and then leaks out slowly during the day.  A bit gross.  Two of the ones I've used, brush itself partially separated from the head, creating a gap that pinched to the point of drawing blood.<br /><br />They're cheap in price because they are cheaply made.  Avoid them.
Rating: 1 stars