Removes up to 2x more plaque (vs a regular manual toothbrush based on in vitro laboratory testing). Fits Philips Sonicare screw-on electric toothbrushes. See back for compatibility. Contoured brush head with slim, angled neck design provides exceptional cleaning of all tooth surfaces and deep between teeth. Designed to fit the following Philips sonicare power toothbrush handles: Advance; Xtreme; Essence; Elite; CleanCare. Green Replace-Me Bristles fade with use to remind user to replace brush head. For optimal performance, remove and clean the brush head at least once per week including under the removable nut. 100% Quality Guaranteed: Like it or let us make it right. That's our quality promise. Recyclable packaging materials.