Product review (1 stars): Ad should read "Fits SOME Duet models..."
This product isn't properly advertised, which is partially the fault of Whirlpool.  I purchased a Whirlpool Duet at Lowe's.  My wife decided that she hated them side by side, so I ordered a stack kit that fits the Duet (given this product's description).  We ordered it in May but just now cleared the space to get them stacked in October.  Alas, as most other 1 star reviews can attest to, the brackets are 1/4" off.

This advertisement needs to specify WHICH Duets this actually fits instead of insinuating that it fits ALL Duet models from Whirlpool.  Hopefully I'll be able to return this to Amazon even after it's been so long.

The only way to see what product you actually need is by going to Whirlpool's website, looking up your specific model number of dryer/washer, and looking into the accessory section to find your ACTUAL part number that is required for the stack kit.  In my case, I needed a W10298318RP.  Thanks, Whirlpool.