With EHEIM classic you have everything that makes up a good external filter. By choosing a classic you won’t go wrong. Because you have chosen a reliable, millionfold tried and tested piece of equipment. All models perform to the highest quality standards. First class components and carefully matched features ensure perfect pump and filter performance. Additionally, you have the proverbial EHEIM quiet running, robust durability and low energy consumption. Benefits of EHEIM classic external filter Millionfold tried and tested Exceptional value for money very quiet running low energy consumption long-lasting flexible silicon sealing ring in pumphead (for easy and safe replacement after cleaning) Can be filled with filter pads and/or loose filter media Comes with all media, hoses and accessories required for start up Versatile accessories Specifications Model: 2211 / Classic 150 Aquaium Capacity: 12 - 37 Gallons Filter Volume: 1.0 Liter Output: 75GPH Power Consumption: 5W Inlet / Outlet Size: 12mm (1/2") / 9mm (3/8") Dimensions: 11.5" x 4.4" x 4.4"