Otto Musica Artino Sound Anchor For cello / double bass Box, wooden Artino Sound Anchor For cello / double bass Box, wooden For cello or bass Material: Walnut/Rosewood Features: Tone improvement design, the best sound enhancing, adjustable nylon strap, slip proof pad keeps it in place For cello or bassMaterial: Walnut/RosewoodFeatures: Tone improvement design, the best sound enhancing, adjustable nylon strap, slip proof pad keeps it in place