The Elite 803 Air Pump - 110 V Elite Air Pumps are a reliable source of air for air operated items, such as Elite air stones, Elite bubble air, air actuated ornaments, air driven protein skimmers or for adding movement or oxygen to any aquarium. - Quiet - Powerful - Durable - Guaranteed - 1 outlet - 3500 cm³/minute - 4.0 P.S.I. - 4.0 Watts/hour - Recommended Aquarium 20 gal - 1 extra diaphragm Noise dampening pump cover Base plate prevents pump vibration and movement long lasting stay cool coil Precision engineered swing arm with permanent magnet Tensile Flex durable diaphragm