Poolmaster's Premier Swimming Pool Collection features high-quality materials with outstanding performance in mind for season-after-season use designed to keep your pool sparkling. For continual dispensing of chlorine, why not choose a colorful critter character to do the work for you. Made of non-corrosive materials, the adjusting chlorination ring can be set to give you just the right amount of chlorine needed to keep your pool water balanced perfectly. Holds up to 3-inch tablets.