Made by LifeDeluxe Spa Thermometer - Spa and Hot tub Essentials
Comes with an anchor and cord for easy mounting.
If you need a thermometer for your hot tub or spa then take a look at this quality thermometer made by 'Life', its corrosion resistant baody has been specifically designed to sit inside your hot tub and be anchored on the outside (also comes with a loop on top). It is easy to read and has both Celsius and Fahrenheit on the front.
It goes without saying it can also be used around your garden as well.