Stubben's Sweet Copper Mouth Loose Ring Bradoon bit Size: 5” sweet copper encourages the horse to chew, enhancing saliva production; the location of the copper link in the center of the mouthpiece also encourages horses to salivate because their taste buds are situated in the center of the tongue. (90% Copper, 7% Iron + Aluminum, No Nickel) combined with very high strength. 14mm thick mouth, small 55mm ring USED lightly by my petite and sensitive OTTB. I have photos of it being compared to another larger snaffle piece. It worked for her due to the way her mouth is situated. Yet would work for other horses and ponies. Also can be used traditionally with another bit in dressage. My mare LOVED this bit yet she also loooves giving me vet bills 🤦‍♀️. So it has to find a new home.