APC AR8422 rack accessory Rack shelf

APC AR8422. Type: Rack shelf, Product color: Black, Rack capacity: 3U. Width: 19.5" (495 mm), Depth (max): 10.2" (26 cm), Height: 4.88" (124 mm). Package width: 11.5" (292 mm), Package depth: 21.5" (546 mm), Package height: 11" (279 mm)