StarTech.com 1U Server Rack Shelf, Universal Rack Mount Cantilever Tray for 19' Network Equipment Rack, Heavy Duty Steel, 7' (17.8cm) Deep - 1U 19in server rack cabinet shelf 7in deep - EIA/ECA-310 Cantilever tray w/universal fit in Data/Network enclosures w/cage nuts & screws for mounting - Heavy-duty easy to install, durable design w/ SPCC commercial cold-rolled steel 33lb weight cap.