As with many other bits, a pelham may have a solid or a jointed mouthpiece. If solid, it may range from a nearly straight "Mullen" mouthpiece up to a medium port. The pelham's mouthpiece controls the pressure on the tongue, roof of the mouth, and bars. A mullen mouth places even pressure on the bars and tongue. A port places more pressure on the bars, and provide room for the tongue. A high port may act on the roof of the mouth as it touches, and will act as a fulcrum, amplifying the pressure on the bars of the mouth.