This Lasalle Bristol Holding Tank Heater is used to prevent freeze-ups in holding tanks and steps. Specifications•Compatibility: Prevent Freeze-Ups In Holding Tanks/ Steps•Temperature Rating (Deg F):45 Degree Fahrenheit ON/ 67 Degree Fahrenheit Off•Mounting Type: Peel And Stick•Voltage Rating: 13.5 Volt•Ampere Rating: 4.8 Inch•Length (IN):18 Inch•Width (IN):12 Inch Meets The Highest Quality Standards Easy to Install | Lasalle Bristol Holding Tank Heater, 18" L x 12" W, 40 Gallon