The Myers model horn mouthpiece is available in bore sizes #1-#8 (5.8 mm through 5.1mm). The cup diameter measures 16.7mm and the rim is medium thin. 

This unique model is based on a design taken from early Viennese style horn mouthpieces. The cup is a long funnel shape. This most unusual feature gives this mouthpiece great depth and warmth of sound while still allowing for tremendous efficiency throughout the ranges.

“The basic problem of finding a mouthpiece that both provides a ring to the sound in soft playing, yet does not break-up in extremely loud playing finds its solution here. This mouthpiece is virtually impossible to over blow and the sound is quite even throughout the ranges. This mouthpiece has no traditional bowl, but rather curves in instead down from the rim. This cup design, plus the slightly longer length of this mouthpiece, causes an M1 to feel like a conventional 4 or 5 bore and an M8 more like the conventional 12 bore. These mouthpieces simply do not take as much air to play as the same sized mouthpiece you are now using.”

Made in the USA.