The 36 mouthpiece on the 3-ring combo gives you all of the benefits as listed above in the 33 combo, but additionally will help the horse to break at the poll and come into a more rounded frame, with less contact from the rider.
The 36 mouthpiece is for trained and compliant horses that are simply reluctant to break at the poll or come into a rounded frame.
89-31365 Stainless Steel 3-Ring Combination Bit MB 36;5″ ; 5 1/2″mouthpiece is a Sweet Iron Forward Tilt Ported Barrel (MB 36, Level 2-3) with copper inlay.
This mouthpeice is made of polished Sweet Iron which naturally oxidizes or rusts.
Harmless to horses, it has a sweet taste and promotes salivaiton. Comes with black leather noseband.