The SMS SU010008-P1 H Small metal shelf BL is a metal shelf listed as an accessory for signage display mounts. It provides a shelf component for use with that mounting category.
Its confirmed construction is metal. The listing identifies the item as a small shelf, without providing dimensions or specifying what it is intended to hold. The MPN is SU010008-P1, which identifies this particular SMS product.
This description covers the shelf itself; package contents beyond the listed product are not specified.