#6.5 Stopper with a 15 inch thermowell so you can read the temperature from the middle of your fermenter and has a second hole for your airlock (not included)

Fits all sizes of our glass carboys and all of the blichmann fermenators.

The thermowell is the perfect size for the probe on our Two Stage Digital Thermostats (will not work with the probe on our analog thermostats)!!!