BLUE BRISTLES REMINDER & COLOR CODED RING: Blue reminder bristles will be faded to white when a replacement is needed. The color coded ring will help you to pick up your personal brush heads so that you can share the package with the family. PREMIUM DuPont BRISTLE: Homelink electric toothbrush heads for Oral B adopt DuPont filaments, which has been approved as the apex of quality in the oral care synthetic filament industry. REMOVE PLAQUE & WHITEN YOUR TEETH: Homelink lightweight oral b brush heads are designed ergonomically which can remove plaque efficiently and reach deep between your teeth, offering you a comfortable cleaning experience. GREAT COMPATIBILITY: Homelink replacement heads can fit most Oral b electric toothbrushes such as ORAL B PRO, GENIUS and SMART SERIES, except for Oral B Pulsonic. (Homelink designs with tightened heads, please press with strength during installation). 16 Pcs Oral B REPLACEMENT TOOTHBRUSH HEADS: Including 4 Floss Action, 4 Sensitive Clean, 4 Precision Clean & 4 3D White, Homelink electric brush heads fit all your personal needs. (NOTE: Homelink is not associated with Oral B).