Based on this product's specifications, here are some alternatives and similar models
Rack shelf CATerpillar TN-19-250-1U-BK — 1U steel shelf, black
Summary description:
CATerpillar TN-19-250-1U-BK is a 1U rack shelf designed for 19-inch server cabinets. Made of steel with a black finish, it provides a durable platform for mounting equipment and accessories. Supplied as a single unit per pack, it is suitable for supporting non-rackmount devices, tools, or cable management in data racks and network closets.