Marcinkiewicz 7C Mouthpiece for Trombone KS, Mouthpiece, For tenor trombone, Small shank, Outer diameter: 37.77 mm, Inner diameter: 25.12 mm, Cup depth: 22.02 mm, Bore: 5.94 mm, Total length: 80.52 mm, Colour: Silver-plated, Comparable to Bach 7C
