Product review (5 stars): Check Compatibility of Model Numbers! Mine worked.
Perfect fit for my microwave vent; even though this is a different model number than the one I'm supposed to have. If you go to the Whirlpool website, they have a tool that allows you to check model numbers of your appliances and see what types of different extra parts you can buy.

For example, the model number of my microwave is ABC but the specific filter for ABC is pricey. However, the filter for microwave XYZ is cheaper. I can go to Whirlpool and check to see if filter XYZ is compatible with microwave ABC. Hope that makes sense!

I strongly recommend you to utilize Whirlpool's tool and save yourself some grief.