Good nozzles are easily removable, easy to put in place, good shape, not very large, convenient reach inaccessible places. But there is one thing I have always rear of the brush scratches on the teeth, and it ceases to be smooth, and then brush scratches the gums. So if you have this problem, I do not advise to take the nozzle, so that the rear part of the left, changing only the bristles.