Sweet Copper Roller promotes salivation with slightly softer pressure on the tongue. Balanced pressure on tongue and bars with no palate pressure. No nutcracker effect. More forgiving to mistakes caused by rider’s strong hands. Loose rings enable horse to position bit in his mouth. Rein tension positions the bit ideally for easy acceptance. Thickness: 16mm / Ring size: 70mm 5 3/4" 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.