From the product description, check product page for current description, price and availability:

• MONITOR FERMENTATION: The G. Francis® Homebrew 1/4″ Stainless Steel Thermowell and #7 Bung Stopper for Glass Carboy Fermentation Temperature Thermometer Probe gives your temperature controller accurate readings to keep your beer at a precise temperature for sterile temperature control; Heating kit and carboy not included
• KEEP OUT CONTAMINATION: Place a probe inside the tube and then inside your beer fermentation vessel (not included) to monitor your wort while keeping out harmful contaminants and aeration
• USE YOUR CARBOY: Compatible with most standard glass carboys, temperature controllers, and airlocks; The thermowell is entirely removable from the stopper to fit different sized configurations (#10 stoppers are recommended for plastic carboys)
• COMBINATION SET: In addition to the thermowell, the included #7 bung plug stopper has an airlock hole with a 0.25-inch (6mm) diameter for standard size airlock to prevent your carboy from building up pressure; The stopper has a 1.3-inch (33mm) top diameter and 0.9-inch (24mm) bottom diameter and includes all hardware needed for exact temperature control even in colder environments
• SECURE FIT: Constructed with a stainless-steel tube and silicone bung stopper; Make sure the carboy surface and the stopper itself are dry in order for it to stay secure once pressed into carboy; Approximate 0.25-inch (6mm) tube inside diameter (ID); 15.5-inch (39.4cm) overall length; 14.25-inch (36.2cm) tube and 1.1-inch (2.8cm) stopper

From the product description, check product page for current description, price and availability:

• ✓ EFFORTLESS HEATING SETUP: Simply set the temperature probe, plug-in the controller, and use the large 3-button interface to choose your desired temperature setting. Digital display supports units in both Fahrenheit and Celsius. Note: the controller is designed to have a 2-3 degree buffering zone before powering on again after reaching set temperature.
• ✓ EASE OF MIND: Handy LED heating and power indicator lights allow you to see the controller’s status even in total darkness. Controller features a convenient hanging tab, and a bright, easy-to-read display inside a tough plastic housing.
• ✓ RUGGED CONSTRUCTION: The cord for the temperature probe and grounded 3-prong plug measure an extended 6 feet in length, designed to suit almost any application you can imagine.
• ✓ VARIETY OF USES: Our thermostat controller can be used for seedling germination, rooting, brewing, heating, fermentation, and more, keeping your various environments in their ideal temperature range.
• ✓ SAFE & RELIABLE: Our thermostat controller is ETL listed, and rigorously tested for quality control and safety. Conforms to UL Std No. 60730-1, 60730-2-9. Temperature control range is 40-108°F, temperature display range is 32 -140°F. Rated Voltage is 120VAC 60Hz, Max Loading: 8.3A 1000W. Do not immerse controller or probe into water.

From the product description, check product page for current description, price and availability:

• MONITOR FERMENTATION: The G. Francis® Homebrew 1/4″ Stainless Steel Thermowell and #7 Bung Stopper for Glass Carboy Fermentation Temperature Thermometer Probe gives your temperature controller accurate readings to keep your beer at a precise temperature for sterile temperature control; Heating kit and carboy not included
• KEEP OUT CONTAMINATION: Place a probe inside the tube and then inside your beer fermentation vessel (not included) to monitor your wort while keeping out harmful contaminants and aeration
• USE YOUR CARBOY: Compatible with most standard glass carboys, temperature controllers, and airlocks; The thermowell is entirely removable from the stopper to fit different sized configurations (#10 stoppers are recommended for plastic carboys)
• COMBINATION SET: In addition to the thermowell, the included #7 bung plug stopper has an airlock hole with a 0.25-inch (6mm) diameter for standard size airlock to prevent your carboy from building up pressure; The stopper has a 1.3-inch (33mm) top diameter and 0.9-inch (24mm) bottom diameter and includes all hardware needed for exact temperature control even in colder environments
• SECURE FIT: Constructed with a stainless-steel tube and silicone bung stopper; Make sure the carboy surface and the stopper itself are dry in order for it to stay secure once pressed into carboy; Approximate 0.25-inch (6mm) tube inside diameter (ID); 15.5-inch (39.4cm) overall length; 14.25-inch (36.2cm) tube and 1.1-inch (2.8cm) stopper