For dispensing chlorine to maintain balanced and healthy pool and spa water, this floating adjustable-chlorine dispenser features a disbersement-release ring that gives you control of the level of chlorine needed for maintaining clean sparkling water. The twist-lock cap is easy to remove and lock back into place. For refilling, simply twist the cap and insert your 3 in. Tablets or sticks. Holds up to four 3 in. Tablets. The poly-foam inner core keeps the dispenser upright and buoyant at all times. The non-corrosive outer shell withstands harsh UV light and chemicals. Features: For dispensing chlorine as needed to maintain proper water chemistry Holds approximately three to four 3 in. Chlorine tablets or chlorine sticks The base of the dispenser features an adjustable chlorine-control ring that allows you to set the level of chlorine dispersing necessary to maintain the proper chemical balance for your pool Dispenser features an easy-to-open twist top that allows ample room for adding tablets or sticks as needed Dispenser is constructed with a non-corrosive ABS exterior shell with a dense foam-core center that provides balanced buoyancy in the water This dispenser measures approximately 7 1/4 in. D x 7 1/4 in. H