Hydra Aquatics Glass Hang-on Thermometer is designed to hang on to the walls of rimless glass tanks. 

• These elegantly crafted glass thermometers are reliable and easy-to-read.
• Measure temperatures ranging from 30 to 100 degrees Fahrenheit.
• Hydra Aquatics thermometers hang securely and can be easily moved or placed discreetly in a corner
• The minimal design allows aquarists to place the thermometer inside their aquariums without obstructing the view. 
• These thermometers are ideal for hobbyists who want the most natural look possible. 
• Suitable for both freshwater and saltwater systems. 
• 15cm length
• Maximum glass thickness: either 5mm or 8mm.