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.This accessory is designed for use with select range vent hoods; check to see if your model number is compatible. Set includes three filters. Size: approx. 10″ L x 6″ W each. Installing this accessory will require basic hand tools, some disassembly of the range hood and novice repair experience.Helpful Tip: Replace your your range hood s filter every 6 months to maximize performance and efficiency.