UPGRADED SUITE: RIVECO enthusiast 9U networking rack suite meets your one-stop-shop needs.Including all necessary hardware: assembly screws & nuts, leveling feet and casters; one piece of universal vented rack shelf and a 8 outlets PDU for daily usage. VARIOUS SIZES: 19.7 " (500 mm) (W), 21.7" (550 mm) (D), 22.7"575 mm with casters(H). There are more sizes 6U, 12U, 15U, 18U ,22U,25U to choose from. HEAVY -DUTY: Features high quality SPCC cold-rolled steel and excellent workmanship can safely support maximum 500 lbs.220 kgof rack mounting equipment with leveling feet, and 400 lbs. (180 kg) equipment with casters. The black RAL9005 powder coat finish makes this solid 9U home rack resistant to scratching and rusting. STURDY TOP& BOTTOM PLATES: 4 posts open frame construction with reinforced top& bottom vented plates is convenient to put your laptop, laser projector, game console, CD player, or even a beautiful plant on the rack. PPLICATIONS: One side round holes