Chatsworth Cantilever Fixed Shelf 19" Rack Mount Center Weighted Solid (Non-Vented) CPI 11164 Series Double Sided Shelves Chatsworth Double Sided Shelf for 2-post Rack Mount # 11164-119 Gray # 11164-219 White # 11164-519 Clear # 11164-719 Black > Sturdy .090 aluminum. > Supports up to 200 lbs. > Shelf is 20.00” deep . > For 3” double sided racks. > Shipping weight: 8 lbs. > Mounting hardware not included.