Product description Size: 4.5mm Color: Red, Black material: plastic Package Contents: 10 One Way Water Stop Valves 1.Improve CO2 dissolving: Double sealing ring improves CO2 dissolving efficiency. 2. Non-slip: The suction cup makes the bubble stone firmly adhere to the water tank, not easy to slip. 3.Applicable For: Suitable for families, desktop fish tanks, ponds, fish tanks. 4. Replaceable Disc Oxygen Bubbler: The material is sturdy and durable. It can be used for a long time and has better dissolved oxygen effect. When the bubble bursts in the water, the sound is super quiet. 5. Produce bubbles: A large number of fine bubbles are generated in the aquarium and dazzle.
