Description: 【Design】The float fish tank oil skimmer adopts hydrodynamics that the water flow rotates into the and the oil film is automatically rolled into the flower basket 【Material】The aquatic lily pipe is made of premium acrylic material, with highly transparent body, , lightweight and long using time 【Great Features】The fish tank oil skimmer is convenient to operate and it can effectively remove the oil film on the water surface, lightweight and small, easy storage and carrying 【Easy Installation】The water inlet is recommended to be 3-5cm away from the water level, so that the flower basket has a float space to meet certain water level change. And The flower basket should be installed 90 degrees perpendicular to the water surface 【Wide Application】The aquarium oil skimmer is widely suitable for water inlet of various filter, such as submersible pumps and filter barrel Specification: Material: Acrylic Size Chart: Inner diameter: Outer diameter, Height 1.6cm/0.63inch: 2cm/0.79inch, 2.1cm/0.83inch 2cm/0.79inch: 2.65cm/1.04inch, 2.9cm/1.14inch 2.5cm/0.98inch: 3.17cm/1.25inch, 3.2cm/1.26inch 3.2cm/1.26inch: 3.8cm/1.50inch, 5.1cm/2.01inch Package Includes: 1x Aquarium Surface Skimmer   Note: Please allow slightly errors 1-2cm/0.39-0.79inch differences due to manual measurement.