This pelham is derived from the vulcanite pelham, so populary used by hunters and polo players for many generations. The gentle mouthpiece can encourage some horses to lean. It is not suitable in horses with shallow-palated mouths. Ideally used with double reins - the curb rein applies poll pressure to lower the horses head and curb groove pressure to tilt the angle of the nose in towards the chest. The snaffle rein has a more direct contact with the horses mouth. It can also be used with rein connectors and therefore a single rein. Sizes: 4.5", 5" , 5.5" and 6".