Myler Western Dee with Sweet Iron Mullen Triple Barrel 5" MB 32-3Myler Stainless Steel Western Dee, MB 32 3 Mullen Triple Barrel, Level 2 The MB 32 3 is an innovative Myler alternative to the traditional mullen. It has three barrels, which turn the mouthpiece from the typical solid bar of a mullen into a flexible bar, which allows the horse to elevate his tongue and swallow more easily. When the reins are engaged, the mouthpiece becomes a solid bar like a traditional mullen, but with an exaggerated curve. This