Nature's Own Potassium Chloride Water Softener Cubes, 40 lb. is a salt- water softener regenerant designed to be compatible with all softener models. These cubes provide a natural source of potassium, which supports your dietary needs while keeping your clothes and dishes cleaner. Additionally, they help protect your pipes and appliances from the damaging effects of hard water. Conveniently packaged in a ready-to-use 40 lb. bag, this product an effective and eco-friendly solution for maintaining your water quality. Model Number: