New in the package - Brass Breakaway Ferrule works with 7/16" tubing. 
Used with the 7/16 gas aluminum tubing found in the vintage stoves connecting thermostats, solenoids and safety valves. Compression fitting.

(7/16 aluminum tubing is available in store)

We recommend you consult with a certified professional or a company with a working knowledge of vintage gas stoves, and gas related products prior to the installation of this part.