These are the same great 14mm universal hydratubes I sell, but I have etched these with my one of a kind art work! Get them while you can, I may never make the same one twice.
* these are all hand etched by me.
The function is great on these and they can be used with any device with one of my 14mm adapters. They also fit the Carta by just sticking it in the base, but I prefer to use the 14mm adapter.