Oral-B Toothbrush 3 Effect Classic 40 help access to posterior teeth. Polished, end-rounded bristles deeply penetrate hard-to-reach areas gently and safely. Blue Indicator bristles fade with gauge wear and the remaining effectiveness of the brush. The Oral-B 3-Effect Classic Toothbrush is especially designed to access the posterior teeth. With blue indicator bristles that fade with gauge gear wear.
