UNIVERSAL: 1 u 14" depth rack mount shelves work great for all 19? standard racks and cabinets, shelving for IT, data network stereo equipment MAXIMUM AIRFLOW: Vented design speeds up the heat dissipation, keeping the equipment cool prolonged STURDY DURABLE: This classic cantilever tray features high quality SPCC cold rolled steel, 2.0 mm thickness, ideal for server and normal network devices with width less than 19? DIMENSION : 19? (width)* 13.8? (depth)*1.78? (height) EASY TO INSTALL : Comes with 2 pieces of 14" server rack shelves, mounting screws cage nuts in one packing box. Easy to install within a few minutes