LOTUS Trumpet 11M2 Nickel Silv. Gen3; mouthpiece for trumpet; cup diameter: 15.8 mm, comparable to Schilke 5B3A, Warburton 11SV and Yamaha 5B4A; cup depth: medium shallow; bore: 3.6 mm; material: nickel silver (brighter and more focused sound, clearer articulation), LOTUS gold plating: hypoallergenic, scratch-resistant and does not tarnish; bright and full sound; clear response; good note targeting; suitable for classical, jazz, lead playing and big band.