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, you should replace it promptly with this item. This grease filter is an accessory that can be used across several brands; check to see if your model number is compatible. Size: approx. 12" L x 6" W. Installing this accessory will require basic hand tools, some disassembly and novice repair experience.