Stainless Steel Eggbutt without HooksMB 04 Low Port Comfort SnaffleLevel 2 The MB 04 is similar to the MB 02 in that it will rotate on the tongue and apply tongue pressure, however, it has a small (¼") port that introduces some tongue relief to the horse. The port allows the horse to swallow and move his tongue when he is moving forward and relaxed, which acts as a release or reward. The mouthpiece is curved, and it wraps around the bars and lips instead of pinching. Independent Side Movement Stainless Steel Mouthpiece Curved mouthpiece does not pinch lips and bars Copper Inlay An eggbutt is a traditional cheek style which keeps the mouthpiece from draping on the tongue, providing a more direct signal than the loose ring. The straight side of eggbutt will not pull through the mouth and does not pinch. For a more versatile version, see the eggbutt with hooks. Size: 3 ½" rounded ring Action: Direct Discipline: English or Western