Poolmaster 32140 Pool Duck Chlorine Dispenser for Tablets up to 3". Poolmaster’s Premier 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 chlorine dispenser 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″ tablets.