“My jugs flow at least double the rate they did before. What's more, it seems to solve another issue most fuel jugs have. Every nice jug I have seen either has no vent, or one located just a couple inches from the main opening (instead of on the opposite side of the handle). This means you have to hold the jug at just the perfect angle to keep fuel from oozing out the vent and onto your vehicle. With these Ai hoses, fuel flows so fast that I am not tempted to tilt the jug as far as before, and at the same time, air is going in through the vent so hard that I have yet to have any fuel spill onto my vehicle (airplane wing). I can't say enough. I bought three, and will probably buy 1-2 more now.”