Gleichweit Bb- Clarinet Zimper - DW, Mouthpiece for Bb Clarinet, Viennese cut, Christoph Zimper model, German wide bore (15 mm), Length of slide: 34 mm, Tip opening: 0.85 mm, For wooden reeds, Recommended reeds: : Leuthner Standard and Professional (Viennese cut) and Pilgerstorfer Concerto, Vienna, Morré ""Pi"".