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. Kit Includes (3) Charcoal Filters Measuring 18-7/8" L X 13" W And Mounting Clips. This Charcoal Filter Kit Is An Accessory That Can Be Used Across Several Brands; Check To See If Your Model Number Is Compatible. Installing This Accessory Will Require Basic Hand Tools, But No Disassembly Of The Range Hood Or Repair Experience. You Must Shut Off The House Circuit Breaker For The Appliance Before Installing This. Helpful Tip: Replace Your Range Hood S Filter Every 6 Months To Maximize Performance And Efficiency.