Floating Sanitizer Dispenser plus a tilt device that acts as a refill reminder. A twist lock top for protection and a variable flow ring to manage chlorination. Holds 1" or 3" tablets. Longer throat size helps to keep float from settling on steps. Each unit holds four and a half pounds (4 1/2 lbs.) of three-inch tablets, or one-inch tablets. High Capacity 4.5 LB.