Thank you very much for viewing. Compatible replacement brush heads for the EB17-P model electric toothbrush, compatible with Leading Power toothbrushes, recommended to be replaced every 3 months. - Model: EB17-P - Compatibility: Leading Power toothbrushes - Recommended use: Replace every 3 months - Installation: Easy to install - Quantity: 4 pieces per set x 4 sets [16 pieces total] Although new and unopened, it has been stored at home. Please understand this before purchasing. Also, please feel free to contact us if you have any questions!