The Rack is an OEM replacement part for Frigidaire wall ovens. It is designed to provide a stable and secure surface for placing cookware and bakeware inside the oven. Causes of a bad rack can include warping or bending from exposure to high oven heat over extended use. Heavy pots or pans dragged across rack surfaces may puncture or dent racks over time. Symptoms of a bad rack include: Difficulty smoothly sliding racks in or removing them from the oven Sagging or unstable surfaces that may compromise food placement Rust or corrosion on the rack This Frigidaire OEM replacement part is also compatible with Electrolux, Gibson, Kelvinator, and some Kenmore models5304531722 (AP7186780) replaces 5304526378, 5304530329.