Product review (5 stars): Far superior to other Splash Guards
Fits my SinkMaster perfectly and is far superior to the other offerings. The flimsy alternatives which say they are design for the Sinkmaster and Whirlaway do not stay in place, don't seal against water splash, and deteriorate immediately.  This GE unit is not listed as being compatible with Sinkmaster, but after long search I found one association of the part number (from a prior manufacturer) to my disposal. So I decided to give it a try.  Wow, what a difference.  My 10 year old disposal  now sounds quieter than it did when originally purchased, and there is never any water shooting out.  With the lesser splash guards I would hold a plate over the disposal opening during turn on.  Not any more!  Can't say enough about how surprised and pleased I was to find a superior product.  We have been using it for three months with no problems and no indication of wear out.