Herm Sprenger NATHE Standard Loose Ring Snaffle Bit - 20mmWe love this Bit not only for its composition of hypoallergenic Thermoplastic, but also the soft flexible mullen mouth that evenly conforms to the horse's mouth. Mouth and tongue friendly Low port Suitable for young or sensitive horses Steady and even pressure on the tongue Higher pressure on tongue edges from rein aids Steel core Material Thermoplastic Bit size 130 mm, 140 mm Bit thickness 20mm Mouthpiece Mullen mouth Ring Diameter 55mm Ring Type