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and a secure grip
The combination of a unique rim
Inner Diameter: 33mm/1
Cup: Inner diameter
you can easily alternate between buzzing and playing your instrument by switching the mouthpiece
Mercer and Barker GW4 Euphonium Mouthpiece discount and a secure gripUsed Mercer & Barker GW4 Euphonium Mouthpiece Excellent Condition Up for sale is a premium, precision engineered Mercer & Barker GW4 Euphonium Mouthpiece (Large Shank). Known for their top tier British craftsmanship, Mercer & Barker mouthpieces are highly sought after by elite brass players for their ability to significantly enhance core sound, adaptability, and intonation stability across all registers. Why Players Love the GW4 The GW4 is Mercer &