The Sonicare For Kids toothbrush head is perfect for small mouths with growing teeth. It works exclusively with the For Kids power toothbrush, and together they deliver a safe and more pleasant experience that kids find fun and habit-forming.Replacement brush heads fits with FlexCare handles only. Precision cleaning in hard-to-reach areas. Easy to maneuver in smaller mouths, ideal for use with braces. Clinically proven to remove more plaque. Replace brush heads at least every 3 months to achieve optimal results. Look inside for replacement reminder label.