Product Overview Custom BT#1.5 Trombone MouthpieceInner diameter: 1.087" or 27.6096mmBore Size: Standard - .290" or 7.366mm, Symphonic - .295" or 7.493mmCup Depth: 1.439" or 36.550mmThe BT#1.5 is available in both the heavy or light weight blank style. Reviews (1 review) Write a Review 1 Review Hide Reviews Show Reviews 5 Stork 1.5 Posted by Gerald Osterman on 5th Oct 2023 A great choice for 2nd or 3rd trombone.
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