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. 2-pack. Size: approx. 12" L x 6" W. Replacing this part will require no disassembly or repair experience.