Fits most Oral-B power brushes. No. 1 used by dentists worldwide. Dual action. Superior cleaning (vs. a regular manual toothbrush). Does Not Fit: Pulsonic; 3D White Battery; Complete Battery; Pro-Health Battery. 1. Both brush heads move for twice the cleaning action. 2. Indicator bristles signal time to replace brush head. Dentists recommend changing your brush head every 3 months. 3. Interchangeable Brush Head: Floss Action; Sensitive Gum Care; 3D White; Cross Action; Precision Clean; Deep Sweep. www.oralb.com. Customer Service Number: 1-800-56-OralB (1-800-566-7252). www.pg.com. Made in Germany.