Euphonium Mouthpiece JK (Yacht Car) Elite Series Mitsuru Saito Signature Model SP (Silver Plated) M.S-2 Size: Silky 51D Equivalent Shank: L (Large Shank) The M.S-2 will likely make it relatively easier to control the high register and pitch, which can take time to master with the M.S-1. Furthermore, using the M.S-2 can be expected to improve sound projection. Thank you for viewing.