Dentists recommend changing your toothbrush every 1-3 months. Description: Provides a naturally white smile. Aid in the effective cleaning of the teeth,gums and below the gum line. Apply to:D25,D18,D12,D8,D4X,D4,D17,D4510,D12013,D12013W,D12523,D8011,D9525,D9511 Compatibility:Triumph,Professional Care,Vitality&Advance Power.(except Sonic and Cross action) Oral-B 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 Oral-B Triumph Professional Care:9000,9100,9400,9425,9450,9475,9500,9900,9910,9930,9950 Oral-B Trizone:600,1000,3000,5000 Oral-B Triumph:5000 wireless SmartGuide,4000,Triumph 5000 inkl.Smart Guide Oral-B Smart Series:4000,4750,5000,SmartSeries 4000 ,Smart Series 5000 with SmartGuide Oral-B Advance Power:400,450,450TX,800,850,900,950,950TX Features: Model:SB-17A Material:Soft Bristle Color:As the picture show Package included: 1 x 4pcs electric toothbrush head Notice: 1.Please allow 1-3mm error due to manual measurement,please make sure you do not mind before you bid. 2.The colors may have different as the difference display,please understand.