I bought the replacement brushes for my Philips sonic toothbrush. Quality product stands etc .. The display I have to disagree, quality of product is the whole Meilenweit away !!! Just because a brush at first glance looks almost identical and fits onto the handpiece it is in my opinion far from being a quality product! I am dental prophylaxis assistant and we looked at together with our dental technician this "quality product" under the microscope, and also an original brush head. With its product the bristles are only truncated because not a single bristle is rounded only in the beginning! That is already negligently so what ever sell !! The borders already on assault! With 31,000 vibrations with non-rounded and thus sharp bristles on the gums and teeth is anything but gentle !!! So I'll guarantee not brush my gums to shreds and scratch me my tooth enamel !!