Contains the powerful Hailea Model 9610 4 outlet air pump, Quiet, durable and with adjustable air flow control. Also comes with 2 XL sponge filters that can service up to a 70 gallon aquarium. Also comes with 40 ft of silicone air line tubing and 4 adjustable air flow valves. This set up is remarkable versatile. Can handle up to 4 sponge filters or any combination of filters, air stream devices or bubbler decorations.