A set of 4 Diamond Clean mini type that can be used with the Philips electric toothbrush "Sonicare" series. ŸFor those who are concerned about yellowing and roughness of teeth ŸRhombus-shaped bristles powerfully remove plaque and stains ŸRegular size ŸSet of 4 ŸSonicare Diamond Clean is the former name of White Plus, the same brush type model.