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Ships within 48 hours · Estimated delivery Aug 9 - Aug 14
Inner Diameter: 33mm/1
Backbore inner diameter: 11mm/0
and doubling situations without feeling tight or stuffy
3 is a shallow
The SP5 has the same large diameter of the RT50+
Mercer and Barker GW4 Euphonium Mouthpiece discount Inner Diameter: 33mm/1Used 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 &