This Philips Sonicare toothbrush head features a contoured profile to naturally fit the shape of your teeth and to clean hard-to-reach areas. This brush head removes up to 2 times more plaque than a manual toothbrush. Philips Sonicare brush heads are vital for high-frequency, high-amplitude brush movements performing over 31,000 brush strokes per minute. Philips' sonic technology fully extends the power from the handle all the way to the tip of the brush head. This sonic motion creates a dynamic fluid action that drives fluid deep between teeth and along the gum line for superior, yet gentle, cleaning every time. Like all Philips Sonicare brush heads, this brush head is safe on teeth and gums. Each brush head has been quality tested for exceptional performance and durability. The brush head clicks on and off your brush handle for a secure fit and easy maintenance and cleaning. It fits all Philips Sonicare toothbrush handles except: PowerUp Battery and Essence. Includes 8 replacement heads for a Philips Sonicare toothbrush. For optimal results, replace your brush head every three months.