The listing, Used Under the Tank Fluker's Reptile Heater has ended.
This is a used heater for a reptile tank around 20 gallons. It is still in working order. The brand is Fluker's.The heater itself measures 6 x 11 inches and is extremely thin. One side generates more heat than the other. It is to be attached to the bottom of the tank. I had it attached with electrical tape. There is still some of the residue on the one side of it that I couldn't get off. You can't use water on it or bend it. Bending it can damage the internal mechanics and cause electric shock, fire, etc.