So I have been a big supporter of rapid air for my air lines in my home shop and at work. I use the 3/4" product in my shop at work and the 1/2" product in my home shop. So the story here... I installed 1/2" in my home shop 5 years ago, from the 100' roll I only used 60' or so. So not wanting to throw out the 40' I had left over I kept it. Fast forward 5 years, we sold our house and I built a new shop, last weekend was the time to install new air lines so I broke out the 40' roll I had saved to start the installation. After sitting this long the line just snaps, it has become so brittle it wont bend, it just breaks(and no I'm not trying make 90's with it, just trying to straighten out the roll). I was pretty amazed at how quickly it deteriorated. It makes me think to myself how potentially unsafe this could be if under pressure and it were to get hit with anything. Just food for thought, I'm not nearly as impressed with the 1/2" product as I was a few years ago.