Product review (3 stars): Worked OK
Not sure why they make dryer vent hose and fittings that are so hard to get together (diameters seem almost identical) but this item worked after messing around a bit.  Material is very thin, so I ended up with some creases in the connections that leaked but I fixed the problem with Scotch Aluminum Foil Tape 3311 Silver, 2 in x 10 yd 3.6 mil (Pack of 1). Both ends rotate to compensate for misalignment if it matters.