The Star Mfg 5N-22618 universal oven hood pre-filter measures 16" x 20" x 2" and fits designated ventilation filter applications. Positioned ahead of the primary filtration stage, a pre-filter captures larger airborne particles before they reach downstream filtration components. Its dimensions are essential when checking the filter housing and replacement requirements. https://partsfe.com/5n-22618-star-mfg-pre-filter/1-5N-22618.html