buffet crampon e11 bb clarinet silver plated keys buffet crampon we are happy to offer our customers the e-11 bb clarinet, now with silver plated keys. silver keys not only offer a more dynamic appearance, they also benefit the player with a more usable keys surface while playing. a big enhancement over the standard nickel keys. the e11 clarinet is made of african blackwood, which is also called m'pingo wood. this special wood is found in the forests of mozambique and tanzania. m'pingo wood is known for its resonance and stability, making it an ideal material for musical instruments. this clarinet also includes a upgraded lightweight backpack style case not available with the nickel key e-11.