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, efficient operation. Specially designed plug to fit through all drain holes 3/4 in diameter or larger. Safe for horses and other livestock and safe in both plastic and metal tanks. Recommended for tanks 100 to 300 gal. 6 ft cord with durable anti-rub protector. Not Lockndry compatible. cULus Listed. 1500 W, 120 V, 60 Hz. One year warranty.