Bass Trombone mouthpiece Bach 1G large shank

VINCENT BACH 341-1G DEEP CUP LARGE BORE TROMBONE MOUTHPIECE

Cup diameter = 28mm
Rim shape = Medium Thin, well rrounded.
Extra large and deep for extraordinary power and depth of tone. Among the largest and most powerful bass trombone mouthpieces produced today. .319 inch throat/ 800S backbore.