While I for the most part prefer the quality of ac delco parts, their customer support leaves a lot to be desired. I was going to switch to this product as it covers several sizes of lines. The instructions sheet that came with it leaves more than a little to be desired. Specifically which direction the ANTI-VIBRATION TENSION RING (feral) is supposed to face, the rest of the directions were pretty clear. I checked with a couple of friends that are A/C technicians at gm dealerships and got two conflicting answers, tried calling ac delco's professional help line and wasn't smart enough to find the right person to help among the myriad of choices. As soon as I get thru the inventory that I have purchased I will go back to using Murray products. It just should not be this hard.