Stopper Thermowell

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Use in conjunction with a Digital Temperature Controller and an Electric Fermentation Heater (#40535) 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. Show more