Use in conjunction our and  Electric Fermentation Heater for complete control over fermenting temperatures in cool environments. Fits 3, 5, 6, or 6.5-gallon glass . Not compatible with Better Bottles.

Also compatible with the Northern Brewer Dual-Stage Temp Controller, Inkbird Temp Controller, Thermostar®, and Johnson Digital temperature controllers.

*Big mouth bubbler and lid not included.