Madison Accessories Tank Blanket 13.6V 83W 20 Gal Holding Tank Heater 61004 69-6544

Used to prevent freeze-ups in water tanks. 6 Amp heater heats a 20 gallon capacity tank. Thermostat control turns on at 40 deg & off at 58 deg. It has peel & stick aluminum backing. Measures 12 inch width x 18 inch length.