This 1U Server Rack Shelf adds adjustable mounting depth to any EIA-310 compliant 4-post 19-inch rack or cabinet. The depth can be adjusted by up to 6.4in (16.3cm), ranging from 28 to 34.4in (71.1 to 87.3cm), to support a wide range of equipment configurations. The venting holes on the shelf surface enable improved airflow to dissipate heat and helps maintain optimal equipment temperatures. The variable depth rack tray is made of 19-gauge (1.1mm) SPCC steel for long-term durability, sturdiness, and rigidity while supporting up to150 (68kg) of equipment. Accommodate server rack equipment, accessories, or non-mountable devices for ease of access and connectivity.