The product is well made, although it "unrolls" quite easily. It must be handled with care so as not to spoil it. I ordered this item because my portable air conditioner requires a 5" duct and is hard to find. Unfortunately, it turned out that it is not suitable for my air conditioning system. Actually I need a white plastic bleed valve, not a metal valve. Since I damaged the product before I knew it, I didn't send it back (it was my fault after all). I just wanted to post a warning. to other air conditioner users that a screw coupling may not work for you.