4.25″ New with tags Myler Extra Wide Low ported D ring without hooks. Level 3 with a wide correction port that offers optimal tongue relief. Has inlayed copper to promote salivation. Hard to find size for a smaller mount or pony. This is a great option for a small horse or large pony who needs the stability of a mullen, ample tongue relief, and some independent side movement to their bit. This is a hard to find mouth and size! Per Myler:
The MB 33WL (wide low) mouthpiece was made specifically to meet the requirements of the USEF dressage rules, making this the only USEF dressage legal Level 3 mouthpiece. The port is 29mm high and generously wide, providing ample room for the tongue. Because the port is lower than the standard MB 33, the MB 33WL does not offer quite as much tongue relief but it is by far the most tongue relief available in a dressage legal mouthpiece.