Marcinkiewicz 6E mouthpiece for trombone, small shank, outside cup diameter 38,96 mm (1,534in.), inside cup diameter 25,78 mm (1,015 in.), cup depth 26,54 mm (1,045 in.), drill venturi 6,35 mm (0,250 in.), length 80,52 mm (3,170 in.), silver plated, comparsion only with Bach 3