Product review (5 stars): Fixes constant unbalanced loads.
Replacing the originals with these after 7 years raised the tub about .5" when empty.  it also resolved constant out of balance issues that had developed over the past 6 months.  If you have UL codes frequently, replace these.  It took about an hour to replace all four for a first timer.  Easy to do, a 2 on a 5 scale.  Greaseless design is much better than original design.