Storz & Bickel's Volcano is a device of great quality, except for a fragile solid valve hosing. The two tabs used to attach it to the chamber or mouth piece are the weak point.

While it is possible to order the replacement, it isn't cheap, and wasn't challenging to reproduce, including the logo...

Fit is perfect and, at least in PETG, the tabs feel much more positive and solid than with the original part.

Enjoy it!