This universal drain plug de-icer mounts securely into the tank's drain hole to keep the heating element away from livestock. Durable stainless steel heating element is thermostatically controlled and features over-temperature protection for safe, efficienct operation. Specially designed plug to fit through all drain holes 1.125" diameter or larger. Safe for horses and other livestock, and safe in both plastic and metal tanks. Recommended for tanks 100-300 gallons. 6-foot cord with durable anti-rub protector. cULus Listed. 1500 Watts, 120 Volts, 60 Hz.