Material type:Plastic Number of items:1 Batteries included?:No Product Dimensions:5 x 2 x 3 cm; 20 Grams Specification: Material: Plastic Color: Black Height: Approx. 5.3cm / 2.1 inch Package list: 2 * Bubble air stone 2 * Suction cup 4 * Filtering cotton About this item The aerobic bubbling oxygen stone is a silent design. With the pump as the driving force, the power of the gas lift is fully utilized, and there is no power device itself, and there is no noise during work. Even if you sleep, it will not affect. The bubble stone has a rotatable design. The size and density of the bubbles can be arbitrarily adjusted. Add a different effect to your fish tank. The cell board produces bubbles finely. Beautiful bubbles will also make oxygen supplements vigorously. It helps to increase oxygen, maintain fresh air and create a healthy environment for fish. Aquarium oxygenated bubble stones can add air flow,circulation to your aquarium, pond, hydroponics and aquaculture to oxygenate water and benefit aquatic life. Air stone is made of high-quality plastic material, which is sturdy and durable. All finishes are non-toxic, safe and environmentally friendly. The aerobic bubbling oxygen stone is a silent design. With the pump as the driving force, the power of the gas lift is fully utilized, and there is no power device itself, and there is no noise during work. Even if you sleep, it will not affect. The bubble stone has a rotatable design. The size and density of the bubbles can be arbitrarily adjusted. Add a different effect to your fish tank. The cell board produces bubbles finely. Beautiful bubbles will also make oxygen supplements vigorously. It helps to increase oxygen, maintain fresh air and create a healthy environment for fish. Aquarium oxygenated bubble stones can add air flow,circulation to your aquarium, pond, hydroponics and aquaculture to oxygenate water and benefit aquatic life. Air stone is made of high-quality plastic material, which is sturdy and durable. All finishes are non-toxic, safe and environmentally friendly.