EHEIM - Classic series canister filters have the longest, most reliable track record in the trade. A pump motor unit that seems to run forever, with a minimum of service. Proven technology, balanced performance and high efficiency place the classic series filters as the bellweather in aquarium filtration. One-chamber design allows for the greatest flexibility in setting up for mechanical, biological, chemical and adsorptive filtration. Flow rates have been precisely calculated to provide the exact balance needed between mechanical and biological long-term filtration, water circulation and oxygen enrichment, resulting in optimum conditions for successful aquarium keeping, with 3-6 month maintenance intervals. Also ideal for specific purpose filtration such as Chemical/Adsorptive (carbon). Tanks to 39 gal. 60gph. Filter volume 0.26gal. Tubing 394 in (3/8") x 494 out (1/2")(112mm). Includes fine, coarse, and carbon pads packed with ehfimech & ehfisubstrat. Power consumption 5w. Weight 7lbs.