Safe and non-toxic Our replacement brush heads have been sterilized by ultraviolet rays, which has ensured the quality and safety of the products, please feel free to use them with your family. End-Rounded bristles In order to bring you a safe and comfortable brushing experience,replacement brush heads are made with high quality polished end-rounded bristles for offering better clean of hard-to-reach areas and bringing comfortable brushing experience. Genuine US Dupont Bristles NEDIFON electric toothbrush replacement heads adapt premium quality end-rounded Dupont Tynex filament for offering better clean clean of hard-to-reach areas and bringing comfortable brushing experience. Reminder Bristles The blue reminder bristles fade to white to let you know when to replace,(Dentists recommend replace the brush head at least once every 3 months). Easy installation Simple, Snap-on installation,just pull out your old electric replacement brush heads and snap the new one on. 360°Effectively Clean The bristles shaping fully adapts to the shape of your teeth and gum, covering more tooth surface, enhancing the sonic cleaning power for effective cleaning in hard-to-reach areas. Compatible with the following phillips sonicare toothbrush： For 2 Series Plaque Control（HX6208, HX6210, HX6211, HX6213, HX6215, HX6220, HX6225, HX6229） For 3 Series Gum Health （HX6610, HX6616, HX6620, HX6631, HX6632） For DiamondClean, DiamondClean Smart（HX9312, HX9322, HX9331, HX9332, HX9340, HX9342, HX9350, HX9351, HX9352, HX9359, HX9361, HX9362, HX9370, HX9371, HX9372, HX9381, HX9382, HX9392, HX9393, HX9903, HX9924, HX9941, HX9957, HX9961） For HealthyWhite, HealthyWhite+（HX6314, HX6710, HX6711, HX6720, HX6721, HX6722, HX6730, HX6731, HX6732, HX6733, HX6750, HX6760, HX6761, HX6780, HX8910, HX8918, HX8962, HX8982） For FlexCare+, FlexCare Platinum（HX6160, HX6902, HX6910, HX6911, HX6920, HX6921, HX6922, HX6930, HX6932, HX6950, HX6960, HX6963, HX6964, HX6970, HX6980, HX6972, HX6992, HX9172, HX9191, HX9192, HX6160, HX9180） For ProtectiveClean（HX4100, HX4300, HX5100, HX6100） For PowerUp（HX3100, HX3110, HX3120, HX3130, HX3300, HX3631, HX3650, HX3220b） For EasyClean（HX6510, HX6511, HX6520, HX6530, HX6551, HX6582, HX9603, HX9604） For Kids （HX6304, HX6311, HX6312, HX6320, HX6321, HX6322, HX6329, HX6330, HX6340, HX6341, HX6343, HX6345, HX6351, HX6352）