Fits all Oral-B electronic toothbrushes. No. 1 used by dentist worldwide. Ultrathin bristles for superior clean and gum protection (Vs. a regular manual toothbrush). Does not fit: Pulsonic; 3D white battery; complete batter; pro-health battery. 1. Ultrathin brisles for gentle, superior cleaning (Vs. a regular manual toothbrush). 2. 2x healthier gums (Vs. a regular manual toothbrush). 3. Dentists recommended changing your brush head every 3 months. 4. Interchangeable Brush Head: CrossAction; FlossAction; 3D white; Sensitive gum case; Precision clean; Dual clean. oralb.com. oralb.ca Customer Service Number: 1-800-56-OralB (1-800-566-7582). Made in Germany.