ZononStick On Thermometer Strips Horizontal Thermometer Stickers Digital Temperature Display for Fermenting, Brewing, Wine, Beer, 64-93 Fahrenheit/ 18-34 Centigrade (12)

They even work after I accidentally ran through dishwasher! Awesome!

Got 12 pack for a 125gal aquarium to have one top and bottom of each side to check for cold spots and keep heaters set right.Having 2 degree increments is wonderful, they are sleek, horizontal and barely noticeable. Good purchase!

Works good 4 my sourdough as our temps flex between am and pm

Bought these for long term use in a reptile terrarium for easy monitoring. It gives me a general idea of temperature and if I see the temp dropping I know my heat bulb is failing. Perfect.

perfect