The R&R oscillating disposable Prophy angle comes with soft rubber Prophy cups in bags containing 100 pieces. The R&R Prophy angle is pre-lubricated, and its unique blue color from iM3 guarantees the Prophy angle's durability throughout the procedure! The 60-degree oscillating "forward and backward" motion of the Prophy cups prevents oral hair tangling and allows the cup to maintain continuous contact with the tooth surface. The oscillating motion also reduces heat and friction on the teeth and does not cause Prophy paste splatter. Guaranteed no hair or mustache tangling.