Mason Jar Neoprene Cover
Vendor: Craft a Brew
This light proof mason jar covers fits a 32oz mason jar for The Catalyst Fermentation System. When combined with the Cover for The Catalyst your homebrew will be 100% covered and UV proof so no matter where your beer is fermenting it will be protected from the light.
Cool jar cozi
The jar cover works great. Fits perfect, keeps the UV out and even looks great.