Features:<br>Wedge-shape design, 360 degree with no dead corner cleaning and protecting your tooth.<br>Dual-dean brush heads can remove plaque without effectively.<br>Clean teeth and massage gums gently.<br>4 brushes with identifier rings.<br>Compatible brushes: D4510 D12013 D12013W D12523 D17525 D18 D19523 D19545 D20523 D20545 OC18 OC20 D8011 D9525 D9511 D25 D30 D32 Type4739 3709 3728 3738<br><br>Specifications:<br>Material: Nylon<br>Bristle type: Soft bristle<br>Head shape: Round shape<br>Quantity: 4pcs<br>Item size: 6cm * 0.8cm / 2.36 * 0.32in<br>Package size: 14 * 8.5 * 1cm / 5.51 * 3.35 * 0.39in<br>Package weight: 28g /0.99oz<br><br>Package List:<br>4 * Toothbrush Head<br><br>Note:<br>1. Why electric toothbrush<br>Compared to manual toothbrush, it has incomparable effects as follows    2 times of wiping off tooth bacteria    32% lower probability of bleeding gums    Enjoying deep cleaning like the orthodontist&#39;s treatment    High rotating frequency discomposes toothpaste quickly and deeply2. Four common tooth brushing errors    Brush time less than 2 minutes    Do not brush tooth after supper    Clean tooth horizontally only and rudely    Just clean the surface of tooth3. Use instructions    Stay on each teeth for several seconds catering for teeth shape    Remember to reach all month parts, inside surface, chewing surface, and the rear part    Lead the brush head with the gum curve one by one gently4. Oral health tips    Dentists recommend changing bristles every 2~3 months    More water drinking, less carbonated beverage    Condition permits, brush tooth every time after every meal