Now you can keep your teeth fresh and clean with these Generic Replacement Toothbrush Heads. They fit perfectly with Philips Sonicare toothbrush and the Sonicare technology helps remove up to two times more plaque, compared to a manual toothbrush. Dental professionals recommend replacing your brush head every three months. Good thing here is the Blue reminder bristles fade in color to let you know when it's time to replace the brush head. Thanks to the brush heads screw-on design, they can be easily removed for cleaning and replacement. The heads come with caps for hygienic storage and travel. Details: Tapered, extra-soft contoured bristles. The e-Series Standard brush heads work with all the following Philips Sonicare models: Advance, Essence, Elite, CleanCare, and Xtreme. They comes with caps for clean storage and in Packs of 2 or 4, buy 4 and save on shipping. ** This is not made by Phillips, it is Generic Brand however 100% compatible with models given above. ** Philips and Sonicare are registered trademark of Philips, Inc.