Product Description:Small bubbles: cell plate produces small bubbles. Beautiful bubbles also vigorously replenish oxygen. It helps to increase oxygen, maintain fresh air, and create a healthy environment for fish.Silent design: Aerobic bubbling oxygen stone is a silent design. Using a pump as the driving force, fully utilizing the power of gas lift, without any power device, there is no noise during operation. Even if you sleep, it won't affect you.Adjustable bubbles: Bubble stones have a rotatable design. The size and density of bubbles can be adjusted arbitrarily. Add different effects to your fish tank.Suction cup design: Adopting superior suction cup design to fix the gas stone, preventing friction and wear, and extending its service life.Suitable for different occasions: Aquarium oxygen containing bubble stone can increase airflow and circulation for your aquarium, pond, hydroponics and aquaculture, so as to provide oxygen containing water and benefit aquatic organisms.Note: It needs to be used after connecting the oxygen pump. Specifications:Color: BlackMaterial: PlasticSize: Approximately 3cm in diameter * 5.3cm in height Package contains: 1* Bubble Air Stone Attention: 1. Due to manual measurement, please allow for minor errors. Please ensure that you do not mind before bidding. 2. Colors may vary depending on the monitor, please understand. Hello, please pay attention to your shipping address when purchasing products. If your shipping information (such as name, street, house number, doorbell/email without a name, etc.) is incorrect, the order will not be delivered correctly.