Features: instrument: old clarinet Böhm - material: rubber - model: black diamond, BD5, CM1005 - tip opening: 1.40 mm, medium (medium) - face length: long (long) _________________ The black diamond rubber mouthpiece for old clarinet has a special internal and external design. This special feature offers the musician a full sound, which is rich in depth and colour, especially in the upper register of the old clarinet.