Jiuzhoudeal Replacement Toothbrush Heads for Philips Sonicare: Toothbrush Heads Compatible with Sonicare C2 Plaque Control ProtectiveClean 4100 5100 6100 Electric Toothbrush HX9023, 10-Pack

Despite what product description says, bristles are NOT rounded. I switched my toothbrush head to Jiuzhoudeal and found that my gums were raw the next day. When I pulled out the microscope to check bristles, sure enough, these are square and sharp. See photos. The first image is of Jiuzhoudeal fibres: note the square ends. Second image is of a genuine Sonicare head: see how the tips are smoothly rounded? This is what a toothbrush should look like. If you have bulletproof gums, chances are you'll be fine with these toothbrush heads, but for most people, there are better choices that are less damaging to your gums. For me at least, the difference is substantial.

First of all these do not fit HX9023 Sonicare units. Secondly, as other reviewers have pointed out bristles are sparse and rough to the the touch. Wish I had opened up one of the sealed packets before the return window had expired. Live and learn...

Just too darn big. The heads are significantly larger than the Sonicare heads. They are much harder and rougher. They scraped up my gums and made me raw. The heads are bigger and you ha e to keep your mouth open wider to avoid hitting your teeth. Not a fan.

At time writing these, I see they are no longer available, which makes me sad. The replacement heads I had before these were not good at all. These were so good, when started using them after old ones I was using, they were like soft pillows hugging my teeth, honestly felt so nice after what I had before. Also they never vibrate off like old ones I had did. And they seem to last forever. I'm not sure if I'm still on the original head from when I first opened the pack, or if I changed it out at one point and forgot, but either way it shows little signs of wear which is amazing. Also been no noticeable change in cleaning over time, where ones I had before started out almost too abrasive, but over time became ineffective. I highly recommend these if they become available again. Maybe is a newer model or something I dunno. The medal rings on the bottom is certainly a very nice advancement.Packaging is great too, the box is very convenient. which each head individually sealed. much better than the display packages some heads come in.

I’ve bought these before and they were great, but this batch is a little different. They work well enough, but don’t fit as well as the previous ones did. Would still buy them again as they are MUCH less expensive than the brand name replacements.

Buying name brand brush replacement heads gets expensive... I decided to give these a try because they were the right price. I was pleasantly surprised. They fit perfectly and are the exact replica of the name brand.The work just the same and I'm happy I can now replace my brush heads more often! It's the small things in life.

Not compatible with HX 6920. Head vibrates off shaft. Bristles are too hard.I previously ordered different company great replacement heads. Came in a beautiful package (looked retail). No longer available on Amazon. 😫I returned the ones I just got the next day. Ordered another brand on Amazon. Seller says it’ll be compatible- we shall see.

They work on my toothbrush and cost so much less. In these days..I change my toothbrush more often as aa choice. It is nice not to pay alot for them and they do the same thing. Did not see my dentist for over a yr+, she said my teeth looked the same as my regular 6 month appt. Very Happy