The Aqua Medic Mistral II 4000 is a powerful diaphragm air pump for use in any aquarium enviroment. The housing of the Aqua Medic Mistral II 4000 is made from cast aluminium and this, combined with the magnetic control system and the vibration reducing rubber feet, results in exceptionally quiet operation. With integrated replaceable air filter and are of low maintenance design. The Aqua Medic Mistral II is ideally suited to supplying fish breeder tanks, air lift filters (under-gravel and box), air stones and protein skimmers using either ceramic or wooden air diffusers.Aqua Medic Mistral II 4000+ high-grade aluminum alloy to shape the case+ double damping system and noise absorbing function+ high performance and low in noise+ double air chambers for large quantity of air and strong air pressure+ Oil-lubricated design to provide pure compressed air+ unique structure, quick in heat dissipation+ complete waterproof structure, no water leaks intechnical data Aqua Medic Mistral II 4000:Cap