This is a replacement BrewZilla PPSU Sight Glass. It can also be custom fit to your brewery vessel with these half inch fitting kit KL33817 - Brewzilla Sight Glass Stainless Steel Connection Kit (Ball valve & Elbow)

Specifications:
100cm Long
13mm ID x 15mm OD

For attaching to your BrewZilla you will need to cut down the 100cm tubing based on your current BrewZillas recirculation arm size. We would recommend purchasing a KL14557 Mini Tube / Pipe Cutter to cut the tube cleanly.
We have a video attached down below showing you how to measure and install this on a BrewZilla.