Out Flow Direction Adjustable, Bottom In Flow Rate Adjustable, 1mm spacing grid type inlet is easy to filter and isolate impurity water, prevent fish and shrimp inhalation. Made of 304 Stainless Steel, Never Rust, Easy Cleaning. With Surface Oil Film Processing Function, Floating Oil Film Position Automatically Adjustable to the Surface Level. Come with Clear Acrylic Pipe Fixer, Easy Install on Your Aquarium. Pipes for 12mm/16mm Tube, outlet can be rotated 360 degree, Pagoda interface, prevent falling off. Specification: Material: Stainless Steel, Acrylic Color: Silver 12 Inlet Outlet:Total Length of Outlet 20cm/7.87inch, Total Length of Inlet 30cm/11.81inch 16 Inlet Outlet:Total Length of Outlet 25cm/9.84inch, Total Length of Inlet 34cm/13.39inch 12 Outlet 16 Inlet:Total Length of Outlet 20cm/7.87inch, Total Length of Inlet 30cm/11.81inch 12 Oil-film:Total Length of Outlet 20cm/7.87inch, Total Length of Inlet 30cm/inch 16 Oil-film:Total Length of Outlet 25cm/9.84inch, Total Length of Inlet 34cm/13.39inch 12 Outlet 16 Oil-film :Total Length of Outlet 20cm/7.87inch, Total Length of Inlet 34cm/13.39inch 12 Oil-film Adjustable :Total Length of Outlet 20cm/7.87inch, Total Length of Inlet 30cm/11.81inch 16 Oil-film Adjustable:Total Length of Outlet 25cm/9.84inch, Total Length of Inlet 34cm/13.39inch 12 Outlet 16 Oil-film Adjustable :Total Length of Outlet 25cm/9.84inch, Total Length of Inlet 34cm/13.39inch Package Includes: 1 Set Aquatic Inflow Lily Pipe