【Material】Made Of High Quality Plastic And High Quality Sand, It Is Strong And Durable And Can Carry Oxygen More Efficiently. 【Features】Rising Air Bubbles Improve Ventilation And Water Flow In The Aquarium. Can Be Used For Decorative And Functional Bubbles. 【Long Life】It Can Be Reused And Cleaned For A Long Time, Providing Good And Stable Ventilation For Your Tropical Fish Tank. 【Perfect Performance】Must be used with air pump and trachea, with good performance (not including air pump and trachea), it is a necessary tool to successfully hold water and fish during Breathing. 【Wide Range Of Applications】4 Pieces With A Length Of 11.6cm And 21.6cm Respectively. Very Suitable For Your Aquarium Or Fish Tank, As Well As The Best Partner For The Air Pump. Instructions: 1: Please soak this product in water for 15 minutes before use. 2: For long-term use, if dirt is blocked and air bubbles are reduced, it can be removed for cleaning and repeated use. 3. Air bars with a length of 10 to 30 cm can
