Great for many applications
Your review: If you're looking for a very small thermometer to install virtually anywhere, these 2" diameter thermometers are perfect for the application. Each unit is a case of 12 thermometers (4 of each color: red, white and black). Out of the whole unit, 1 or 2 of the thermometers may be out of calibration, so it is recommended that you place all 12 in a controlled environment to verify the accuracy of each.
The reason I purchased these thermometers was their shatterproof qualities. As the food safety coordinator of the largest operation in our class, I highly recommend these as they can be installed anywhere (double stick tape or magnet [both included]) and are within the food safety parameters of our auditing service.
At the price these thermometers are being sold, the purchase is a 'no-brainer.'