This Range Wall Hood Recirculation Kit 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 is no longer functioning properly, replacing this filter may alleviate the issue. This accessory can be used across several brands; check to see if your model number is compatible. Installing this part filter will require basic hand tools, some disassembly of the microwave and novice repair experience.