The FSR CB-224 Series 4RU Ceiling Box from FSR BH #FSCB224 is a 2 x 2’ high-capacity ceiling box designed to fit into a standard 2 x 2’ or 2 x 4’ drop ceiling. It features a drop-down 4RU cage for easy installation and mounting of rack equipment. Cable guides for service loops are provided to allow the equipment to be connected in the down position and then to slide up into place. Manual: https://bit.ly/398XDIX The drop-down cage features pneumatic assistance to counter some of the weight of the equipment installed. The CB-224 has 6 AC outlets in the box and 1 in the room. A master power switch is accessible from the room. Note: For use with the common "T" grid drop ceiling systems only; not compatible with all drop ceiling systems.