Replacement Toothbrush Heads 10 Pack for AquaSonic Black Series for Vibe Series Black Series pro, and for Duo Series pro Electric Toothbrush,Balck...

These actually worked well for the different style sonic toothbrushes that we have. You can see pictures that any style with the same length as pictured will work fine. You can also see the gap from the head to the body of the toothbrush. Which is how it is supposed to be. Only 4 stars - does it says it does. But the inside is quite open not sure about the quality or how long they will last. Others seem to be built better or more solid on the inside. Same size same fit same compatibility as others. Good value for the money. At this price I wouldnt worry.

I received these heads quickly and everything was well packaged. I was curious whether they would be compatible with my brand of toothbrush and upon testing I can confirm these are compatible with the Sonicare 4100 series. In addition, unlike the Sonicare brush head that came with the toothbrush, these heads are black and match my Sonicare unit beautifully. So aesthetically they have enhanced my toothbrush as well as serving as a suitable replacement for my prior heads. I was able to brush my teeth using the XIAOHEAD brushes as though I was using an OEM head - the bristles were firm and it generated strong vibration when I turned the unit on. You will receive a total of 10 heads with this pack which I know will last awhile. In addition each head is packaged with a cover so you can keep the bristles protected while the toothbrush is not in use. Priced at $8.99 (as of writing this review) at 0.89 cents per head this is far and away a much more affordable and viable option if you are looking to save a little money. Definitely a good purchase if you are in the market for replacement heads for your Sonicare 4100.

These are normally the heads I use for my toothbrush Its the same brand, But I noticed that they dont fully fit on the toothbrush itself, so water gets underneath.

These are just some no frills replacement brush heads. They work just as well as the original OEM aquasonic brushes. Also, these brushes DO come with the plastic covers over the brushes, so they're a bit better value than the other brush heads that come with the brush heads only and no plastic covers. On top of that, these brush heads are also individually wrapped, so they're perfect to throw into your bag for travelling or whatever. Anyway, they work just fine. I will update this review if they start falling apart prematurely.

It fits perfectly