This Heavy Duty Automatic Waterer provides constant fresh water at all times. Made from heavy duty high density polypropylene can withstand the toughest punishment. Fence or wall mount and easy to clean, just twist the large drain plug and discharge the old water. It's rust proof, durable and cleans easy and sun resistant. Ideal for medium, large dog, goat, sheep, horse or other animals. No training required. Will not over flow. Size 17" x 14" across by 10.5" deep and holds 20 Litres.