Neue Schule Turtle Top Universal - 16mm MouthpieceTurtle Top Universal Ring Bit Ideal for Over Active Mouths Helps Prevent Sideways Tongue Evasion To Achieve a Soft Consistent Contact 16mm Mouthpiece Universal Cheekpieces The Neue Schule Turtle Top Loose Ring Bit with FlexZ is an anatomical inspired double jointed bit design with enhanced mouthpiece stability, through optimized alignment of the mouthpiece surfaces to the tongue and palate. This innovation is brilliant for the over active busy mouth