Stopper Thermowell

Use in conjunction our Northern Brewer Dual-Stage Temp Controller and Fermotemp Electric Fermentation Heater for complete control over fermenting temperatures in cool environments. Fits 3, 5, 6, or 6.5-gallon glass carboys. 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. California Proposition 65 ⚠ Proposition 65 Warning: This product can expose you to chemicals that are known to the State of California to cause cancer and birth defects or other reproductive harm.