The Range Hood Charcoal Filters trap 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 that can be used across several brands; check to see if your model number is compatible. Size: approx. 10" L x 6" W each. Sold as a set of 3. Installing this accessory will require basic hand tools, some disassembly of the range hood and novice repair experience.