Features:Electric Replacement Toothbrush HeadsAdvanced Bristle System removes more plaque and cleans deeper than a manual toothbrush 4 replacement brush heads designed to fit Oral-B electric toothbrushes and plaque remover modelsLong interdental tips clean deep between teeth and below gumlineCompatible with all Oral B Pul-Sonic s26， S26.523.3， S32 etc.Not Fit for S15Dentists generally recommend changing brush heads every 3 months. All our products are brand new and manufacturer sealed.Not made by Oral B.Package included :1 x Set Toothbrush heads In retail package (4pcs/set)