Product review (5 stars): Worked for my Whirlpool Duet WFW8400TW02
Keep in mind when you install these, insert them in to the back of the unit and then slide/lock them in to the back panel.  That isn't so clear when you're trying to have someone lean on the tub to line up the holes.  Once you get one side in, the other side looks off balance, but if you lock the plastic in to place first, the bolt will line up.

Use a flash light, and be sure to get them pretty torqued down.  I apparently didn't, and all four were loose by the time the washer arrived at it's new location.

I have a Whirlpool Duet Sport HE - Model WFW8400TW02 - most sites tell you you need the two short + two long bolts, you do not, you need these for this model.