Product review (4 stars): are separate items you need to order if the old ones are bad. Mine were fine
Even though the photo and the the delivered product did not look identical, a call to the supplier informed me
that there was only ever one part number for these models. Mine fit perfectly, but I suggest watching the online
videos of how to install, as there are a couple of little tips that helped greatly. Most important of these was to lubricate the two
retainer rings with Jet Dry or dish soap so they slip right into place. The rings, by the way, are separate items you need
to order if the old ones are bad. Mine were fine, but new ones aren;t very expensive.