This chlorine float is adjustable for different dosing amounts. Depending on the current chlorine level, more or less chlorine can be added to the pool in this way. The float moves freely in the water, but can also be attached to the pool ladder with a cord (not included) to keep it in place. A chlorine float prevents damage to the pool liner. Features: For slow-dissolving tablets Adjustable opening for controlled release For maintaining water quality Specifications: Color: blue, white Material: plastic Dimensions: 17.5 x 17.5 x 11.5 cm (LxWxH) Weight: 230 grams