Designed to mount through the drain hole in metal or plastic stock tanks. By mounting through the drain hole, the electrical cord is kept out of the water, and the de-icer cannot be thrown from the tank. Built-in thermostat and 6' power cord. fits all stock tanks that have 3/4" drain holes. Power plug is a reduced size and does not require the cord to separate to fit through the drain hole. 1500W, 120V.