Safe & Efficient - Toptheway replacement brush heads are high approved; Super powerful to remove plaque and prevent gingivitis two times better than a regular toothbrush | Highly Compatible - Toptheway brush heads are compatible with Philips Sonicare electric toothbrush handles: Advance, Essence, Elite, CleanCare and Xtreme | High Quality & Worry Free - Toptheway brush heads are made with US rounded end medical grade Tynex Nylon Bristles. It will remind you to replace your brush head through blue indicator bristles | Medical Grade Bristles- Toptheway toothbrush heads are made with US rounded end medical grade Nylon Bristles. Gentle on your gum and blue indicator bristles fade in color to let you know when it's time to replace the brush head. | What You Get - Toptheway replacement toothbrush heads 6 pack and friendly customer service