Compatible with snap on Philips handles: DiamondClean, Flexcare, HealthyWhite, 3 Series Gum Health, 2 Series Plaque Control, and Essence+ handles Part Number: HX9042/64 4X more surface contact Our AdaptiveClean brush head is the only electric toothbrush head that can follow the unique shape of your teeth and gums. With soft flexible sides made of rubber, the bristles of the brush head can adjust to the shape of each tooth’s surface. Up to 2X better for gums Even the deepest clean is gentle. As your sonic toothbrush tracks along the gum line, the flexible sides and bristles of the brush head absorb any excessive pressure you might apply. The soft tissue around your gums is protected even if you brush too hard. Engineered to maximize sonic motion Philips Sonicare brush heads unparalleled sonic technology fully extends the power from the handle all the way to the tip of the brush head. Reminder Bristles Brush heads lose stiffness and gradually wear down over months of normal use. Blue reminder bristles fade to white letting you know its time to replace. Dental professionals recommend replacing your brush head every three months. Fits the following models: