Product review (4 stars): Buy original mfr and save 1/2 or more
Whirlpool OEM part is actually a Sylvania 64405 G4 5T3Q/CL 5W 12V bulb, which is what you will receive when you order this part (see pictures).  This is just your standard halogen 5W 12V bulb with G4 base.

Save yourself some $$ and just order the Sylvania/Osram bulb instead: https://www.amazon.com/dp/B0015FV46S

Install is a PITA (it's just a small bulb for crying out loud), check youtube for how-to or appliance repair sites.  Plan on 1/2 hr.