Product review (5 stars): Nice design, good price.
We have a small laundry room and our new super fancy washer and dryer are pretty huge. The dryer is actually about 5 longer front to back than the washer so fitting a 4 flex hose back there with room to clear bends meant the whole thing hung out into the doorway a couple inches and the door wouldnt shut. After trying multiple things I decided on this one. Our center to center was about 9 and the out is about 2 lower than the in. Took some careful measuring but I nailed it first try. This design is better than others Ive seen. The rectangular section is split so the in pipe slides with one half and the out pipe slides with the other half. Each end has a 45 degree angle piece inside to direct air smoothly around the 90 degree bend. Once you determine your center to center measurement (trick is that center to center is also same as left side of pipe to left side of pipe or right to right, easier to measure) you slide the two halves to get the distance you need, trim off the excess then tape up all the seams with aluminum tape to seal it tight. Comes with cheap clamps so I got quality 4 worm-drive clamps, and doesnt come with tape so youll need to get that too. Once all buttoned up it moved our dryer 3 back farther than when we tried to bend a 4 flex pipe to work. Door closes, mama is happy. Win win.