One very annoying flaw: they brush your teeth fine but do you know what happens when there are holes in the shaft right where you need to form a seal around it with your lips? Spit and toothpaste dribbles down the shaft and onto the handle while you use it. And I see the newer iO models still have this! Did anyone involved in designing this actually use it?

Hard to find this style in any local store glad you sell them online

Great flossing brush, I just don't use everyday. I use cross action every other day.

Great price and fits my oral b brush

I have purchased these for many years and have never been disappointed

I love the brush heads but I only received 5. I emailed customer service and have never heard back

Great for keeping kids rotating the toppers

Good value and they really clean well

Always buy these heads here

Have used this style of brush head for years.