I have a high pressure air compressor that actually needs the higher rated hose I originally bought with it, but that stronger hose is less flexible.  Since I knew I wouldn't be operating the compressor at it's highest pressure, I was able to safely use this lower rated hose for my last project.  Was nice having a more flexible hose to work with than the stronger, heavier duty hose I originally bought.  I actually bought a connector kit and connected the two hoses together to give me lots of length.  Used the original, less flexible hose closer to the compressor and then this lighter hose on the "user" end.