7inch Aquarium Fish Tank Air Stone Stick Bubble Wall Tube Oxygenation Pump Decor. Specifications: Connected to the air pump and placed in the water to help pump oxygen into the water. Always use without worry about blockage, removable and washable, suitable for sea water and fresh water. Can extend the life of the air motor, save electricity and reduce noise. The amount of bubbles is uniform, increase the amount of dissolved oxygen in the water. Can be punched and adjusted according to the needs of the density of the tank. Type: Oxygen Tube Material: Plastic Features: Easy to Install, Aquarium Decor, Bubble Wall, Air Stone Length: 17.8cm/7" (Approx.) Notes: The magical effect of ultra-fine bubble strips will only appear after soaking in water and pumping air for about half an hour. Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement. Package Includes: 1 x Oxygen Tube