11B4 Durable with a slightly shallow cup and a medium rim, perfect for wind bands! With a brilliant tone, it is also suitable for D trumpets, E♭ trumpets, and piccolo trumpets. ■ Cup Volume: B (Slightly Shallow) ■ Rim Inner Diameter: 16.46mm ■ Throat Diameter: 3.65mm 14C4 With a clear bite and a moderate rim, it can be used all-around. Recommended for all players, from beginners to advanced players. ■ Cup Volume: C (Normal) ■ Rim Inner Diameter: 16.46mm ■ Throat Diameter: 3.65mm Very beautiful.