The black 8" Chief FCA810 Fusion Above/Below Shelf for Fusion Mounts is an accessory for adding A/V components or video conferencing equipment to your display mount. The shelf can be used with all Fusion-Series cart, stand, ceiling, and wall mounts. Its height is adjustable from 18 to 30.8" from the shelf to the center of the display, and a lip on the end of the shelf prevents components from sliding off.