Please note: This hood was designed for use with the BrewBuilt CoolStix which has been discontinued. Two of the holes are for an airlock and thermowell, but the third 1/2" hole was intended for the CoolStix and you will need to plug it or utilize it how you see fit.

This silicone 3-hole carboy hood is used alongside the BrewBuilt CoolStix. The holes are for a 1/2" CoolStix, an airlock and a carboy thermowell.

The holes measure 0.500", 0.413", & 0.375"

Compatible with smooth neck carboys only. Does not fit Italian threaded neck carboys.