Yamaha
Yamaha HR-31D4
Cup diameter
17.28
mm
Cup depth
Deep
cup geometry
Throat diameter
4.50
mm
Backbore
Semi-narrow
Shank
other
About this mouthpiece
The Yamaha HR-31D4 is a french horn mouthpiece with a 17.28mm cup diameter and deep cup depth.
Rim
comfort
The part touching the player's lips. Width and curvature affect endurance, comfort, and flexibility.