TubeNet

This is one of the best practice mutes ive ever tried in terms of noise reduction, even loud playing is reduced to conversation like volume levels and ive wrapped the top end with insulation tape which helps quiet the sound even more but more importantly keeps the horns bell safe from scratches. The round bubble part of tje mute does have some dents but they have no effect whatsoever on the sound or fit of the mute. For the most part its a one size fits all i believe only the very smallest of F tubas would have problems with it fitting.
They are about $310 new im asking $200,
Thanks

Is this a tuba mute or a euphonium mute?

tuba mute, sorry forgot to mention that