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.