On the market for years and proven millions of times, the EHEIM classic range has become the basic model in the world of EHEIM external canister filters, yet still features perfect pump output, filter efficiency, maximum running smoothness, and endless continuous operation.The EHEIM classic one-chamber design allows for the greatest flexibility in media set up for biological, mechanical, chemical and adsorptive filtration.FEATURES: Suitable for aquarium sizes up to 40 US Gal Permo-elestic silicon sealing ring fixed on the pump head for easy and safe closing after cleaning Equipped with filter sponges and/or loose filter media A balanced pump output to canister volume ratio ensures optimum conditions in your aquarium. With their low power consumption these models set standards in this class. Many different accessoriesIncluded: Fine, coarse, and carbon pads packed with ehfimech ehfisubstrat Power consumption 5w Weight 7lbs Outlet Hose Diameter: 0.35"/0.50" (9mm/12mm) Inlet Hose Diameter: 0.50"/0.65" (12mm/16mm) Dimensions: 4.3" x 11.4"High quality accessories from the EHEIM range allow this filter to grow with your needs and guarantee long-lasting enjoyment of your hobby.