Pursonic RBH3 Brush Heads with a silicone back tongue brush head Type: Electric Brush Head Features: 3 PACK 8 Replacment Tooth Brush heads for Pursonic Electric toothbrushes models S400 Deluxe, S450 Deluxe and S620. The reverse side features a convenient silicone tongue brush on its reverse side to help eliminate bacteria. Effectively removes plaque with out irritating gums. Reaches deep between teeth to help remove plaque. Helps remove tough stains for whiter looking teeth. Dentist recommend that your toothbrush head be replaced every 2 to 3 months to maintain optimal hygienic results. If your toothbrush head no longer returns to its original shape, it's time for a replacement. These Sonic Toothbrush heads are equipped with specially designed bristles that contour to your teeth to provide effective cleaning action while remaining gentle on your teeth and gums. The reverse side features a convenient silicone tongue br...