Herm Sprenger NATHE Mullen Mouth Gag Bit - 20mmWe love this bit because it offers good control while still being soft on the horse's mouth. Constructed with a Thermoplastic mouthpiece, it is very friendly in sensitive mouths, while the gag effect is helpful for a horse that leans or pulls. Material Thermoplastic Bit size 130 mm Bit thickness 20mm Mouthpiece Mullen mouth Ring Diameter 70mm Ring Type Gag bit Herm Sprenger Bits offer no guarantees in the event of biting on the mouthpiece. Herm