Product review (5 stars): fits perfectly
After searching for awhile, I finally found this knob which fit perfectly on my dryer.  I have a Frigidaire Electrolux  GLGT1031CS1 washer/dryer combo unit.  The serial number on my original knob is 1340349 and this replacement knob is the same serial number.  I had bought another knob with the serial number 134844410, which the frigidaire website says replaces the original knob 1340349, but that is not true.  The shape of the opening on the back of the knob is different than the original.