Ensure you're getting the deepest clean with these Philips Sonicare replacement toothbrush heads. Advanced brush head for deep cleaning. Use with smart brush head recognition handle to unlock smart features. Flexing sides contour to your teeth and gums for more surface contact and a deeper clean. Bristles fade to let you know when it's time for replacement. Recommended to replace brush head every 3 months to maximize effectiveness. WHAT'S INCLUDED: Two standard premium plaque control brush heads. 8.7"H x 2.4"W (each). Designed to work with all click-on Philips Sonicare models. Model no. HX9042/95. Size: One Size. Color: Black. Gender: unisex. Age Group: adult. Material: NONE.