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Yamaha YACTR11B4 Standard Series Mouthpiece for Trumpet : : Musical Instruments, Stage & Studio

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Bach 35110C trumpet mouthpiece, silver Plated, 10C cup: medium; cup Diameter: 16.00mm.

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YAMAHA trumpet mouthpiece standard TR-11B4 NEW from Japan

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Trumpet Mouthpiece with Heavyweight Outer Profile, 11B4 Cup, Semi-shallow Depth, 16.46mm Inner Diameter, and 3.65mm Throat - Gold-plated Rim and Cup

Yamaha Heavyweight Trumpet Mouthpiece - 11B4, Gold-plated Rim and Cup