![Vandoren Black Diamond Bb Clarinet Mouthpieces (BD4, BD5, BD7)](http://www.northcountrywinds.com/cdn/shop/products/bd4-side2_{width}x.jpg?v=1617759629)
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.
BD4: Tip Opening: 115.5 Facing Length: Long
BD5: Tip Opening: 113 Facing Length: Medium
BD5D: Tip Opening: 113 Facing Length: Medium
BD7: Tip Opening: 133 Facing Length: Long
Vandoren has developed the “13 series” mouthpiece specifically for American clarinetists using A440 pitch.