Description: Aquarium outlet lily tube: used with an external filter bucket (not included) to buffer the outlet water flow and make the water flow more naturally. Adjustable: 360° rotation or stay at will, and all the bell mouths are submerged in the water during normal operation. When it is necessary to apply oxygen or remove oil film, the bell mouth should be properly raised to let the effluent flow directly impact the water surface, so that the high oxygen content water formed is directly dissolved into the system tank, removing the oil film on the water surface and increasing the oxygen content of the water. Uses: Effectively remove oil stains on the surface of fish tanks and fish tanks, and provide a fresh and environment. Creates ideal water flow for plant growth. PREMIUM MATERIALS: Simple and beautiful, easy to install on your aquarium. Easy to clean. Gifts: Gifts for people who keep fish. Specification: Material: Acrylic Color: green Size: Approx. Speaker outlet: 10cmx4.6cm/3.94inchx1.81inch Straight Connector: 1.6cm/0.63inch 2.2cm/0.87inch Package Includes: 1 Water Outlet 2 Connectors Note: Please allow slightly errors due to manual measurement and different monitors.