Chatsworth Cantilever Fixed Shelf 19" Rack Mount Center Weighted Solid (Non-Vented) CPI 40108 Series Double Sided Shelves SH2D-3U-CPI-40108-xx Chatsworth Double Sided Shelf for 2-post Rack Mount # 40108-119 Gray # 40108-219 White # 40108-519 Clear # 40108-719 Black > Sturdy .090 aluminum. > Supports up to 100 lbs. > Shelf is 21.75” deep . > For 3” double sided racks. > Shipping weight: 8 lbs. > Mounting hardware not included.