Product review (5 stars): Great vendor
This didn't fit my microwave, despite the length I went to searching the internet for the correct bulb.  I have a Kitchen Aid that apparently has it's parts now made by whirlpool?  All I know is this part number was what I came to after googling the Kitchen Aid part number that was listed in my owner's manual and discovering no one makes that part anymore.  But the interweb gods said, 'here this one will fit!'
Unfort I was led astray, fortunately when I completed the return form, the vendor said, go ahead and keep those bulbs and we'll refund you anyway.  Very nice.  Thank you.
For those who followed this extra long light bulb story to the end, I did end up finding the correct bulb.  I live in a condominium and discovered the maintenance manager has magical lightbulb powers.  I had the correct bulb in a couple days.  Magic :)