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Cons:
4 tips arrived instead of 8
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white
Pros:
Price/quality
Cons:
So far, unknown
Comment:
I'm very happy with the brush heads. The quality is top-notch for the price. All the heads work, they fit the iO series — we have the 9 model. The heads don't rattle, they lock in securely. As for the bristles, I can say for sure they're firm (if you're looking for soft ones, this isn't your option). Overall, a great alternative to the original, especially considering the price.
