The SHELF-1U-20-FIXED-S lets you add a 1U 20 inches (50.8 cm) deep shelf to any EIA-310 compliant 19-inch rack or cabinet. 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. Two installation optionsYou can install the 1U rack shelf using one of two different orientations for mounting. The standard, with the lip facing downwards or inversed with the lip facing upwards that prevents your equipment from sliding off. Hardware includedConveniently includes M6 square cage nuts and M6 screws to setup your equipment in no time. The SHELF-1U-20-FIXED-S is backed by a StarTech.com lifetime warranty and free lifetime technical support.