3 PACK of Replacement Tooth Brush heads for Pursonic Electric Toothbrushes models S400, S420, S430, S450, S620 and S625 models Compatible with Waterpik STRB-3WW compatible models: Waterpik Complete Care 9.0 Water Flosser + Sonic Electric Toothbrush (CC-01) and Waterpik Complete Care 5.0 (WP-861) Compatabile with Welness rechargeable toothbrushes, Dazzlepro's Advanced Sonic Toothbrush and the Advanced GT Sonic Toothbrush. They are also compatible with the follow other toothbrush brands and models: Bling Dental: Diamond 2.0 Health HP-STX 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