This Floating Chemical Dispenser is constructed of high impact polystyrene plastic, for durability and years of trouble-free service. The tropical floating chemical dispenser is fully adjustable and will dispense tri-chlor chlorine tablets or bromine tablets up to 1 3/8" diameter. The adjustable gate control is enhanced by the vented full-flow design. The refill access cap allows the reloading of tablets without affecting the gate setting.