SoniFox Flexisoft Toothbrush Heads are fully compatible with the following Oral-B electronic toothbrush handle models: Professional Care: 500, 550, 1000, 3000, 2000, 600 , 1000 ,3250, 5000, 5500, 6000, 6500, 7400, 7500, 7550, 7850, 7875, 8000, 8300, 8500, 8850, 8860, 8875, 8900, 8950, 3D Excel, Plak Control 3D Triumph Professional Care: 9000, 9100, 9400, 9425, 9450, 9475, 9500, 9900, 9910, 9930, 9950 Trizone: 600, 1000, 3000, 5000 Triumph: 5000 wireless Smart Guide, 4000, Triumph 5000 including Smart Guide Smart Series: 4000, 4750, 5000, Smart Series 4000 , Smart Series 5000 with Smart Guide. Vitality Precision Clean Vitality Floss Action Vitality Sensitive Vitality Sensitive Clean Vitality Pro White Vitality Dual Clean Vitality White and Clean White and Clean Advance Power: 400, 450, 450TX, 800, 850, 900, 950, 950TX, Kids, Kids 950
