The Star Mfg 2I-302579 Oven Pre-Filter Hood Universal is a multipurpose filtration equipment that has been developed to increase airflow in kitchens. Measuring 16” x 20” x 2”, this pre-filter effectively captures grease, smoke, and cooking odors so that your cooking area remains clean. Some advantages resulting from the use of this pre-filter are better air quality, less demand on the primary filters, and safety that comes from the elimination of fire risks by control of grease build-up. Recommended for both commercial and residential use, it helps to maintain a healthier cooking environment and helps to extend the life of your hood system.