Herm Sprenger NATHE RNF Flexible Mullen Mouth Bit - 20mmWe love this bit for the versatility you get from the multiple rein placements. This feature allows the rider to adjust how much leverage action is exerted. Low port 3 rein options to adjust the leverage effect on the poll Variable pressure transmission to tongue and jaw angle Curb chain limits the leverage effect on the poll and acts on the lower jaw Bit guards protect the lips Steel core Curb chain not included Material Thermoplastic Bit size 120