Product review (5 stars): Perfect Fit
These were a perfect fit for my Kitchenaid model KGCS166GSS06 stainless steel gas cook top.  Be sure to use black high temp RTV sealant when installing these.  Also ensure the holes are properly cleaned and thoroughly dry.  Any water or oil in the hole will cause a fairly loud explosion and rubber pieces will fly when the burners heat up.  Trust me.  It scared the crap out of me and my daughter...