Functions as a snaffle with light rein pressure. Has a rigid effect and functions as a mullen mouth when pressure is increased. Acts on the lips, tongue and bars. Excellent training bit with light snaffle effects changing to increased tongue pressure of the mullen mouth. Horses that tend to get strong are corrected by a change of pressure points in the mouth. Thickness: 16mm / Ring size: 70mm ** 4 1/8", 4 1/2", 6 1/2", 7" available upon request ** Association Approvals: Dressage: FEI, USEF, USDF, USEA Eventing: FEI, USEF, USEA Jumping: FEI, USEF, USEA These approvals are the best information we have at this time, but correctness standards are ever evolving. Competitors are reminded that they are responsible for the correctness of their tack. If a rider is unsure of the correctness of any tack, it is the rider’s responsibility to confirm their equipment with the steward or technical delegate.