DR·BEI C1/C2/C3/E0/E3/E5/S7/S03 Electric Tooth brush Replacement Head DuPont Bristle Nozzle Features:1. 1 for DR BEI electrical toothbrush Bet-C01/S7/C1/C2/C3/E0/BET-C1/C2/E3/E5/BET-S03. 2 DuPont bristles, appropriate for sensitive enamel to use. 3. Ultrasonic electric toothbrush can efficiently remove plaque and decrease gingival necrosis. 4. Adopt DuPont American tynex typical 0 bristles bristles,gently on your teeth. five bristle tip diameter, deep clean the space between teeth. 6 authorised by way of FDA and UV sterilized. 7 sealed packing, far more secure to use. eight replace the toothbrush heads each 3 months.