The Eheim Air Pump supplys an extremely quiet air supply to your aquarium and is available in 3 sizes, 100l/h, 200l/h and 400l/h. All 3 models are supplied fully equipped with Air hose and EHEIM adjustable diffusor which can be easily adjusted to your taste and the requirements of your aquarium. - Continuous ultra-quiet operation. - Air flow level adjustable on pump. - Air flow level and apperance adjustable on Eheim diffusor. - Complete with 2 air diffusors and 2m Airline. - 2 airline connections. - Hook for wall fastening, or can be safely mounted on the vibration resisting rubber edges in a traditional manner - 400l/h. - Suitable for freshwater Marine aquariums. - 3 year manufactuerers guarantee.