HITOP Powerful Aquarium Air Pump with 4 Metal Oultes 4-Outlet with Max air volume of 320GPH, enough air bubbles.Metal outlets, will not deform, more durable.Adjustable air volume, wider application. About HITOP -- focusing on aquarium We have been focusing on aquariums for many years and strive to provide excellent aquarium products for aquarium lovers. HITOP 10W 4-Outlets Powerful Aquarium Air Pump large air volume: If you have a lot of fish tanks or a large tank, this one air pump will be a good choice. And we are equipped with 4 *4.9ft long air tubes and enough accessories for your convenience.Compact size: The boxy design makes it not take up too much space and is convenient to place in any corner. Power: 10W (110-120V/60Hz) Max air volume: 320GPH( 4*5L/min) AIR PRESSURE: 22Kpa Ultra Quiet Fish Tank Air Pump Double-layer design for better noise isolation.Semi-mounted built-in air pump to effectively cushion vibration.4 Rubber feet and 8 elastic support feet for further cushion vibration. Complete accessories 4.9ft air tube*4/ air stone*4 check valve*4/ regulating valve*4 suction cups*4/T-connector*2 air filter cotton *2 Replaceable air filter cotton The operation of replacement is simple, which can effectively filter the impurities in the air and prolong the service life of the aquarium aerator pump. Metal outlets Longer service life air pump for aquarium. Easy to connect air tubes and more durable. Adjustable Air Flow Smooth knob on the top, easy to adjust air volume for different applications. Wide range of applications Small pond Aquarium Hydroponic