The SHELF-1U-20-FIXED-V lets you add 1U 20 inches (50.8 cm) deep shelf to any EIA-310 compliant 19-inch rack or cabinet. The shelf is vented to improve airflow and help lower temperatures in your rack. Quality constructionThe fixed-rack shelf can hold up to 55 lbs (25 kg) of equipment and is constructed using 2.0 mm SPCC commercial-grade cold-rolled steel for long-term durability and sturdiness. Accommodate your accessories or non-mountable devices for ease of access or connectivity to your equipment. Maximize ventilationThe vented shelf plate improves the airflow helping to dissipate heat away from your equipment for extended and cooler operation. Hardware includedConveniently includes M6 square cage nuts and M6 screws to set it up in no time. The SHELF-1U-20-FIXED-V is backed by a StarTech.com lifetime warranty and free lifetime technical support.