Marcinkiewicz Claude Gordon #20 mouthpiece for trumpet, outside cup diameter 26,92 mm (1,060 in.), inside cup diameter 17,32 mm (0,682 in.), cup depth 13,54 mm (0,553 in.), drill venturi 4,09 mm (0,161 in.), length 87,63 mm (3.450 in.), round rim, silver plated