Product review (5 stars): Great product!  Couldn't be happier!
Until I found this, I thought I would have to drop my InSInkErator model 555ss out of the sink to replace the integrated original splash guard, which had deteriorated over the past 15 years.  All I had to do with this was to cut away the few remaining ears on the original splash guard, and slip this one into the drain.  It fits my ISE 555ss perfectly, and installation (after cutting out the old one) was all of 5 seconds.  Incredibly easy to put in, yet it stays in place.  It might not muffle the disposer noise, as the package claims, but at least now there is no more splash-back, and no more spoons falling into the disposer.  Overall, I couldn't be happier!!

The package says it will fit the following ISE models:  Badger, 444, 555ss, 777ss, 60s, 80s, 100ss, Pro 333, Pro SS, Pro 77, and Evergrind Accessory.