Gleichweit Bb- Clarinet GH - DW, Mouthpiece For Bb Clarinet, Viennese cut, Gregor Hinterreiter model, Viennese bore (15 mm), Facing length: 36 mm, Tip opening: 0.87 mm, For wooden reeds, Recommended reeds: Leuthner Standard and Professional (Viennese cut) and Pilgerstorfer Concerto, Vienna, Morré ""Pi""