Function: 1. Unique design, no need for special exhaust equipment, no air leakage and sealing design. 2. Disinfectant directly into the pool without additional equipment. 3. To prevent overdose, require a fully enclosed control valve and a built-in check valve. 4. Designed fully automatic low water level: When the pump stops working, the water level is automatically lowered to avoid soaking up chlorine granules and prolonging the life of chlorine granules. 5. Made of high quality environmentally friendly PVC material, corrosion resistant, durable and durable. Specification: Item Type: Automatic Chemical Feeder Material: environmentally friendly pcv; Color: as shown in the picture! Size: about 38,5 x 22,5 cm / 15,2 x 8,9 inches Capacity: 9L External thread: 7 cm/2.76 inch Internal thread: 4.6 cm/1.81 inch Weight: approx. 1800 g/63,5 oz List of packages: 1 x Automatic Chemical Feeder 1 x User Manual Note: 1. Thanks za understanding.2. Monitors are not calibrated the same, the color of the items displayed in the photos may be slightly different from the actual object. Please take the real one as standard.