Review on Enhanced 8 Feet Airline Tubing Kit with Air Stones, Check Valves, Control Valve and Connectors by Crystal Keenan

That's a pretty good number. However, the airlines are not the best. The hose is very flexible and keeps popping out of my air pump. I hooked up an air pump to an old hose I had lying around and all was fine. One when check valves don't work. I blew both ends and no air came through which was a little disappointing. The air stones are good and the valves work so at least it's good and just what I need.