We know how important it is to ensure you're getting the right brush heads, and we're sorry the iO Ultimate Clean replacement brush heads didn't fit your toothbrush. We offer two types of replacement brush heads, iO and non-iO. If you're not using an iO toothbrush, we recommend purchasing one of our non-iO replacement brush heads. We'd be more than happy to help you find the right one for your toothbrush, so when you have a chance, please give us a call at 1-800-566-7252, 9 am-6 pm EST, Monday-Friday.

We're sorry to hear you purchased the wrong brush heads for your Oral-B toothbrush, Tina. With the exception of iO and Pulsonic models, all of our brush heads fit on any of our other electric toothbrush handles. Please give us a call at (800) 566-7252, and we'll be happy to help you get the right brush heads!

Thank you for sharing this, Kysa. Our Oral-B iO brush heads are designed to fit only our Oral-B iO Toothbrushes. We recommend trying our other Oral-B brush heads, as they will fit all of our other Oral-B Power Toothbrushes. If you have any questions, please feel free to give us a call at (800) 566-7252.