TubeNet

All that I have seen have been fairly modestly sized, somewhat suitable for (presumably) Eb's, but a little small even for that. They are a little curious in that the exterior shape doesn't really match that of other Conn tuba mouthpieces.

I have not ever seen one gold plated (at least not by the time I got my hands on it...)

Mike

The one that I have is silver, Eb size, presumably very early, and I've used it for helicons and my raincatcher.

Bob1062 wrote:Is it standard shank?

Only if you mean standard EARLY Eb (ie: bass trombone) size...