The Velda Silenta Pro is a reliable Air Pump that provides all the essential oxygen needed to your pond lifePond and Aquarium fish need a clean environment to live in, this includes water enriched with oxygen. Including an Air Pump helps to deliver the essential oxygen in a simple wayVelda Silenta Pro is a robust air pump with a metal casing, providing a long lasting pump. The pumps are quiet running system thanks to the diaphragms inside and have a low power consumptionEach pump comes with a 8mm diameter airline and large airstones that drive the air from the pump and out as beneficial bubbles. They also come included with a hose splitter connector as well as a 4/6mm outlet air divider.SpecificationsModel - Silenta Pro 1800Output: 1800 LPHPower: 25wOutlet Size: 4/6mmFor Ponds: Up to 7000 LitresMax Depth: 1.5mComes with: 5 Meters of Fibre Strengthened Air Tube, Giant Air Stone (100mm x 50mm), Air Divider (4x outlet 4/6mm) and a Hose Splitter Connector.