Dentists recommend changing your toothbrush every 1-3 months. Description: Deep triple clean make your oral health. Large Brush head area,large range back,strong vibration and super cleanliness. In front of the strong vibration of rotating brush can achieve molar teeth effectively. With the vibration of the rotating brush can remove tartar between the teeth very well effectively. Apply to round head turn electric toothbrush of Oral-B D4510,D12013,D12013W,D12523,D17525,D18,D19523,D19545, D20523,D20545,OC18,D8011,D9525,D9511,D20,D25,D30,D32; Oral-B type4739,3709(not sonic model),3728,3738,3744,3757,4731,4728; Oral-B 1000 series/ 3000 series /5000 series/ 8000 series/ 8850series/ 8900 series. Features: Model:EB30 Weight:31.5g Material:Soft Bristle Size:141mm x 89mm x 14mm 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.