Yamaha GP Mouthpiece 48 Trombone GS, Mouthpiece, For trombone, GP Series, Golden edge and bore, Large shank: 48-GP, Inner diameter: 25.25 mm, Half round contour, Standard thickness, Standard Cup depth, Throat: 6.62 mm, Half wide backbore, Characteristics: Balanced cap and edge for all-round performance, Sophisticated design, especially geared towards professionals
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