Cool Brewing Fermentation Cooler Bag Type_Diffusion Stone do not attempt to use

do not attempt to use it on a liquid post as they are not interchangeable

providing a 100% airtight seal while allowing CO2 to escape safely

Gas Manifold - Pressure Relief Valve 1/4" Male Threading

Capacity: 375 mL

When tightening

Cool Brewing Fermentation Cooler Bag Type_Diffusion Stone do not attempt to useControl your fermentation temperatures with Cool Brewing's simple, yet innovative, insulated fermentation bag. This is the 2nd generation Cool Brew bag, which has made cold fermentation's even easier! Fermenting your homebrew at the right temperature is one of the critical factors in making good beer. Let the temperature get too warm, and your beer will taste 'rough' as the soft malt and vibrant hop flavors disappear! Typically an advanced homebrewer