Universal Fit for 19 Inch Server Rack: with a fixed surface depth of 27.5 inches and an adjustable mounting depth range of 27.5-38 inches,this adjustable vented rack shelf is designed for 19 inch server rack,and suitable for your data,network or other small tools/ equipmentServer Rack Accessories: you will get 1 piece of server rack shelf with adjustable depth and at least 8 screws for installing M6 type,which can meet your needs for installing rack panels without installing and purchasing different types of blank rack mount traysFine Workmanship: the vented shelf is made of metal material with exquisite workmanship,the surface is subject to oil removal,acid pickling,phosphating and electrostatic spraying technology,not easy to rust and reliable,the frosted pattern makes it easier to install,can be applied for a long timeMaximizing Ventilation: the vented server rack mount shelf ensures consistent airflow to effectively dissipate heat from the server,and it can also keep your computer and AV equipment coolHeavy Duty Design: made of SPCC commercial cold rolled steel,the network rack shelf ensures long term durability and supports a total weight load of 175 lbs/ 80 kg,making it a good addition to your rack.