$2.50
Now in two versions to choose from, Celsius (only) and combined Fahrenheit/Celsius. Reads temperatures between about 2 and 36 ºC.
Comes with a waterproof self-adhesive that sticks to glass, plastic and metal. Once attached to the carboy it will illuminate the temperature. Flexible and very easy to use.
Comes with a protective film that can be removed once installed.
Size: 6″.