This Over-The-Range Microwave Charcoal Filter traps grease from the exhaust air of your oven to help prevent it from entering the blower and vent, potentially causing build-up and damage. If your current filter is no longer functioning properly, you should replace it promptly with this item. This is an accessory compatible with several major brands; check to see if your model number is compatible. Size: 5" W x 5" L. Installing this part will require basic hand tools, some disassembly of the microwave and novice repair experience. Wear gloves to protect your hands and unplug the range or shut off the house circuit breaker for the appliance before installing this item.