Marcinkiewicz 4 Mouthpiece for Trombone GS
Marcinkiewicz 4 Mouthpiece for Trombone GS, Mouthpiece for Bass Trombone, Large shank, Outer diameter: 39.12 mm, Inner diameter: 26.06 mm, Cup depth: 28.45 mm, Bore: 7.04 mm, Total length: 80.52 mm, Silver-plated, Comparable to Bach 4