Greg Black 4.5G Symphony Tenor Trombone Mouthpiece, Large Shank

Rim Size "4.5" Mouthpieces

Cup Diameter: 25.95mm, 1.022" Rim Width: Medium Wide Bore: 'K', .281"

Model: 4.5GS Cup Depth: Medium

Model: 4.5G-5G Cup Depth: Medium Deep

Model: 4.5G Cup Depth: Deep