Product review (3 stars): Check your idler wheel before buying.  Not for my Cabrio
I checked here to see if this fit my Whirlpool Cabrio dryer, and it was indicated that it would.

The drive belt was exactly the right size

The two large wheels fit, albeit loosely on their spindles.  Diameter was right both inner and outer, but the width of the bearing was slightly narrower than the originals so they slid slightly side to side.  There are also four wheels on the Cabrio - two on the inner chassis, and two on the front housing.  The old ones were in pretty good shape, so I kept them.

The idler wheel was a completely different design than my own, so I couldn't replace it.

FWIW, the one supplied looks exactly like the one in the picture.  Shame on me for not looking first, I guess.  You should look before purchasing.  I should have just bought the belt.