Aluminum body, built-in check valve bubble counter, no dedicated tube

This bubble counter has a built-in check valve.
The body is made with an aluminum base.

Only the connector part is made of stainless steel.

Compatible tubing is 4mm inner diameter and 6mm outer diameter.
Tubing is not included.

(Accessories)
Aluminum body bubble counter with built-in check valve - 1 pc
2 gaskets
(Used at the connection point with the regulator)