This is the smaller version of the beautiful Balu wood mute. Fits 3/4 size BBb and CC instruments and Eb and F tubas. The tapered cone expands from 3" diameter at the top to about 6.5" diameter where it meets the larger end chamber, which is 11.5" wide. Overall height is 23".
Includes numerous cork blocks which are easily adjusted for a perfect fit in your instrument.
One in stock: walnut. Further availability is unknown.
I might consider this size mute for these smaller size tubas: