Marcinkiewicz E3/3C Mouthpiece for trumpet, outside cup diameter 27,46 mm (1.081 in), inside cup diameter 17,20 mm (-n.), cup depth 10,92 mm (0.430 in.), drill venturi 3,56 mm (0.140 in.), length 87,63 mm, medium round rim, silcer plated, comparsion only with Bach 3C