The Reptitherm Uth Under Tank Heaters are Extremely Economical to Use! Heaters Range From 4 to 24 Watts and Cost Almost Nothing to Operate. They are a Great Heat Source For Your Reptile. Product is black in color. It works great for 50-60 gallon tanks. Instructions: Peel adhesive paper off back of heater and ''stick'' to the bottom UNDERSIDE of your terrarium. We recommend you place heater on either the right or left side of terrarium and gently rub heater to make firm contact with the bottom glass. This allows one side of your terrarium to be warmer than the other thus giving your animal(s) a natural temperature variance. NOT for use with plastic or wood terrariums.
