This shelf fits on top of any 30" oven and provides extra space for a microwave, toaster oven, air fryer, spice rack, etc. Perfect for small kitchens. It was only used for 12 months while I was living in a rental. Nw I am back in my home with a 36" oven so no longer have need of it. It costs about $155 at Home Depot. It's in excellent condition.