Product review (1 stars): Don't waste your money
First, its diameter didn't fit to my standard wall connection, it seems larger by few millimeters. I tried many many times, I even tried to narrow the corrugation on it, and tried to make large plication in the crown, so it may fit, and even with that there was no way it will, so I ended up removing the corrugated metal crown on that end that makes it fit inside my connection, and connected it to the outside of my connection, which is not as sturdy or safe, because there is not enough clearance to use the aluminum tape to secure it in place (I might add a clamp at later time), so finally after struggling with it for more than half an hour, I managed to get it in and secure, then I started to slowly push the dryer back to make sure I don't crush the thing, but before you know it, it flattened at the S curves, which made it severely and dangerously constricted, even my LG flagged it as severely restricted flow, so I have to take it apart, try to smooth it's curves again and start from square one. it is doing the job, but not for long, because I can't trust it and I am already looking for better alternatives, don't waste you hard earned money on this cheap duct, unless may be you combine with elbows and that will take the twist away !!