Ported Mouth Pelham Blue Sweet Iron - 130mm (Ported Mouth Blue Sweet Iron)Ported Mouth Pelham Blue Sweet Iron 130mm Mouthpiece: Ported for tongue relief and reduced bar pressure. Material: Blue sweet iron naturally oxidizes to promote salivation and acceptance of the bit. Leverage Options: Available with 5 cm (lighter curb action) or 7 cm (stronger curb action) shanks. The pelham itself allows pressure to be exerted on the poll, the curb groove and the mouth to encourage a head lowering effect. Rein Options: Designed for