Product review (4 stars): Are these genuine Whirlpool parts?
These parts are in bags that do not say Whirlpool on them.  The same parts that I ordered a few years back from Whirlpool directly did have the company name on them.  Therefore I'm not sure if these are genuine parts.
Having said that they do seem to be doing their job.  They are the 'upgraded' pulley system which has a rotating pulley at the top as well as at the bottom (previously the top was 'fixed' and only the bottom turned).  Apart from this they are exactly the same as before - not much you can say about a dishwasher part!