Product review (2 stars): too noisy
I purchased this to fix the failed part on my Whirlpool/Kenmore dishwasher.  The parts were a good fit and I had little trouble swapping them out.  Note, the upper guide on this part is actually a roller, while the original part I removed had a fixed sheave type design.  The lower guides on both are rollers.

Unfortunately, the rollers on these made a terrible, loud, groaning & squealing sound when opening and closing the door.  I sprayed them with silicone lube, took the rollers apart to make sure it was worked into the bushings, etc, but nothing worked.  Unusable.  Fortunately what had failed on my washer was the ropes, so I simply replaced those and continued using the existing guides.  The door operates silently, as it should.

So <$7 delivered is a great price for sure, unfortunately I can't recommend it if you actually need the guides.