This Over-The-Range Microwave Grease Filter Traps Grease From The Exhaust Air Of Your Oven To Prevent It From Entering The Blower And Vent, Potentially Causing Build-Up And Damage. If Your Current Filter Can No Longer Be Cleaned And Is Not Functioning Properly, Replacing This Accessory May Alleviate The Issue. Includes (2) Filters Measuring Approx. 12" L X 6" W Each. Installing This Accessory Will Require No Disassembly Or Repair Experience. You Must Unplug The Range Or Shut Off The House Circuit Breaker For The Appliance Before Installing.