Product review (2 stars): They fit as expected. The light bulb itself works ...
They fit as expected.  The light bulb itself works but I am having to change them about every 40 days. I don't know if it is the bulb or my microwave burning them up.  I have had bulbs in older microwaves I have never had to change.  Also, one of the bulbs in the 4 pack had a broken filament and it didn't work :-(