What size is the filter? Will it fit my model and will it cut the grease when venting?
Also, can I get a better grease filter that's in the unit?
The part number that you listed is a charcoal filter and would not be used for grease. The only grease filter for your unit would be the ones that come with the unit and is part number WB06X10596. The charcoal filter is for odors and is part number WB02X10733.
What is the dimension of this filter? I noticed its a optional for my microwave model jvm1870sk04 where can I insert this filter?
This filter would go under where the vent grill is and the dimensions are approximately 6 1/8" width and 9 1/2" length.