Bullet Points : 1 > Combines Oral-B'S Iconic Round Brush Head With Gentle Micro-Vibrations For A Surprisingly Enjoyable Experience And Healthy Teeth And Gums For Life 2 >Reduces Plaque Build-Up Along The Gumline 3 >The Dual-Length Bristles Surround And Reach Deep In-Between Teeth And Have High Density For An Ultimate Clean 4 >Compatible With Oral-B Io Electric Toothbrush Handles Description : Oral-B Io Ultimate Clean Replacement Brush Heads, White, 4 Count