Marcinkiewicz 8 mouthpiece for trombone, small shank, outside cup diameter 38,96 mm (1,534in.), inside cup diameter 25,93 mm (1,021 in.), cup depth 25,27 mm (0,995 in.), drill venturi 6,63 mm (0,261 in.), length 80,52 mm (3,170 in.), silver plated, comparsion only with Bach 4