This shelf accessory is for use with AD-TVC-75 TV/AV cart exclusively. The cart comes with one shelf, standard, and is upgradable with this accessory where multiple device shelves are required. The shelf AD-TVAC-SH75 has capacity 11kg (24lb). It is made of steel with a plastic protective lip, and has 10 years warranty. Multiple additional shelves may be mounted on AD-TVC-75.