Because the MB 33 offers such a high degree of tongue relief

One size 70 x 90cm

which attach to the larger ring adjacent to the mouthpiece

see the MB 43LP or MB 43MP

Myler Correctional Ported Barrel Pelham MB 41PB - 5" Cat_Novelty Gifts Because the MB 33 offersThe Myler Correctional Ported Barrel Pelham features the MB 41PB design which is a truly unique Myler mouthpiece. This mouthpiece is a correctional mouthpiece, a ported mouthpiece that collapses on to the outer lip and bars, and rotates on to the tongue. The port has a tiered design; the base is generously wide with rounded corners, offering virtually the same comfort and tongue relief of a Level 3 mouthpiece, while the top is narrower and has