Gleichweit Bb- Clarinet B9-1 - DW, Mouthpiece for Bb Clarinet, For French reeds, German wide bore (15 mm), Facing length: 22 mm, Tip opening: 1.24 mm, For wooden and plastic reeds, Recommended reeds: D'Addario, Legere European Cut, Leuthner french, Pilgerstorfer french, Vandoren V12