Product review (5 stars): Amazon is now my go-to for appliance parts. Whodathunkit.
As described, fit perfectly in our KitchenAid dishwasher. These work on a timer, and if partially clogged, don't let in enough water to effectively wash the dishes. I took the old one apart (9 years old) and couldn't see why it wasn't working, but the new one just lets a lot more water through. As good a price on Amazon as other parts stores, and Prime shipping can't be beat.