This complete air kit is perfect for small ponds under 2000 gallons. The 6 watt dual outlet air pump is capable of pumping out up to 9.5 liters per minute of air. The high quality silicone air discs are self-weighted and self righting. They always land right side up. Very low maintenance system. Kit includes: - 6 watt dual outlet air pump 9.5 lpm. - 2 weighted silicone air diffuser discs 3.5" diameter. - 2 lengths of black airline tubing. (60 ft total) - 2 check valves.