Vandoren CM1404 Bb Clarinet Mouthpiece Black Diamond BD4This mouthpiece shares the same sound qualities as the BD5 and has a remarkable ease of emission and articulation. The Black Diamond Ebonite mouthpiece features a new internal and external design. These developments offer the musician a full sound, rich in depth and color, especially in the upper register of the clarinet. Opening 1 100 mm 115. 5 Facing length medium long Instrument bb clarinet Series clarinet black diamond mouthpieces