This Blow Off Assembly replaces the stopper and airlock on our MoreBeer! conicals, and is geared toward those of you with their conicals in a spare refrigerator. It includes a 20 inch thermowell that will house the temperature probe on a Ranco controller. Clamp the unit onto the lid of your conical with the included tri-clamp set up, and run your blow off tubing (also included) into a blow off bucket. This is the same unit we include with our Heated and Cooled conicals.