HIGH QUALITY MATERIAL - Made of high quality plastic, the floating box is non-toxic and harmless. It does not harm human health and can be used safely. The plastic is scratch-resistant, wear-resistant and durable, and it has a long service life. ADJUSTABLE OPENING - The bottom of the dispenser can be adjusted, it has 4 adjustable openings. And the dispensing flow can be twist adjusted. You can adjust it according to the dosage you need. EASY TO USE - Unscrew the top cover, fill the chlorine tablets, twist the bottom to adjust the required amount, then place it in the pool. 1 inch chlorine tablets can be placed directly and 3 inch ones need to be crushed in advance. NECESSARY FOR HEALTH - It can keep pool water clean and healthy. The floating chlorine dispenser creates a clean and hygienic environment for family or clients, so everyone can be reassured in the water. WIDELY USED - Not only suitable for indoor and outdoor swimming pools, but also for water parks , SPAS, aquariums, etc. (The size: 4.96 (top diameter) x 5.32 (height) x 1.97 (bottom diameter) inches).