Compatible With most Oral-B Braun round head electric toothbrush models, including 1 ×Toothbrush Charging Base. Genius Series: 6000, 8000, 8850, 8900, 9000, 9000S. Professional Series: 500, 600, 1000, 2000, 2500, 3000, 4000, 5000.
eBay