The 47PB is a correctional mouthpiece, a ported mouthpiece that collapses on to the outer lip and bars, and rotates on to the tongue. The port is narrower than a Level 3 mouthpiece, but offers plenty of room for the horses tongue to pass under the bit. The angles of the port are rounded, so when the bit collapses and applies two points of pressure on the tongue, the pressure is mild. The port on this mouthpiece is 1 ?" high, so it will apply some palate pressure. Sweet Iron mouthpiece oxidizes and encourages salivation.
Independent Side Movement
Sweet Iron mouthpiece
Curved mouthpiece does not pinch lips or bars
The 5" HBT shank is stainless steel and slightly curved back, with a flat-top purchase and a rein ring. The mouthpiece has a fixed attachment. The HBT shank has the patented Independent Swivel Cheek, where the purchase, mouthpiece and shank all move independently of each other. The purchase is slightly angled away from the cheek to avoid rubbing. It has an indirect (curb) rein action designed to be used with a curb strap which attaches to the purchase. The HBT shank uses the combination of the fixed cheek and fixed rein to apply pressure to the mouth, chin and poll.