Product review (5 stars): Fits perfect, and a lot quieter operation
This fixed my agitator issue on my Whirlpool washer. My agitator dog ears were very worn which was causing a loud grinding noise every few seconds. I could have replaced just those four parts (dog ears) for a bit cheaper, but I figured while I had it all apart I would replace the entire cam, bolt and o-ring. I was confused because other suppliers say that the cam needed for my washer is described as "medium" and this item has it listed as "medium" and "small". That should probably be corrected by Amazon (or sellers) to alleviate confusion. This cam is roughly 2.375" tall and fits perfectly. I'm not sure if this is considered small or medium, but it fits just right in my washer.

I also didn't understand the removal of the factory 'tags' on the lower agitator. It seems like if they were removed then it would be a bit more difficult to install. I didn't remove them and everything snapped into place perfectly.

The part number on the cam that I replaced was FSP 3363663.