6 PCS Aquarium Thermometer Strips, Fish Tank Thermometer 1.58" x 0.67" About this item Temperature Range: Measure 64F to 86F (18C to 30C) with accuracy +/- 1C. Easy to Read: The thermometer strip is a piece of temperature-sensitive paper. The colored marking shows the current temperature. If shows multi-color, please choose the average value. Easy to Stick On: Simply pulled the backing off to reveal the adhesive back and applied to the front of your fish tank. Please note: Be sure to stick below the water level, the lower the better. Or else, it may not change colors. Wide Application: Ideal for monitoring temps of your fish tank, reptile tank, wine cooler fridge, beer fermenters, veggies jars, ect. Includes: 6pcs aquarium thermometer strips. Dimension: 1.58" (L) x 0.67" (W)