Product review (4 stars): Keep an extra set on hand...
These things and the 154576501 Frigidaire Dishwasher Bottom Door Seal are the only things that ever go wrong with my now 10 year old frigidaire dishwasher...  so I keep an extra set on hand.  (So far have replaced twice) While they are relatively inexpensive, they are just two 2" pieces of plastic with a silicon blade... seems like these should be a $3-5 dollar part... they do tear easily after a few years of use.