The pre-cut foam blocks fit perfectly into each of the five compartments of the patent pending K&H Poultry Waterers (sold separately).

Great for chickens, ducks, horses, pets, goats, etc. Keeps water available and ice-free in the winter months for all animals and pets. Can be used with aluminum and plastic Poultry Waterers, dog bowls, buckets and other water receptacles. Bottom is sealed to prevent unwanted pests from nesting. 5...