Product review (4 stars): Perfect fit for my Whirlpool above stove microwave
Perfect fit for my Whirlpool above stove microwave.  Why the bulb in in the middle of the rectangular area screws in across the short length is beyond me.  Probably so you have to buy manufacturer brand bulbs.  These are short enough.  The ones I purchased prior to these at at the hardware store were a fraction of an inch too long.  If you have a whirlpool microwave, buy the whirlpool bulbs.

4 stars because they need an LED version.  My husband likes to leave the over the stove light on overnight and these last maybe 4 - 6 weeks with that behavior.  So now you know why they sell them in a three pack!