Tecmojo server shelves were created to be compatible with all 19-inch server racks and rack tray,rackmount shelf is adaptable for multiple locations and applications. It is perfect for office,in-studio and on-stage use as well as for small home network installation. Available in 6", 8", 10", 12", 14" depth,1 pack and 2 pack,Meet different needs. Heavy Duty 1U Server Rack Shelf: Made from 1.5mm thick cold rolled steel with reinforced edges for superior strength. This 19-inch lenth 6-inch depth rack mount cantilever shelf supports up to 55 lbs (25 kg), ideal for servers, switches, routers, UPS units, and AV equipment Universal 19-Inch Rack Mount Compatibility: Designed to fit standard 19" server racks, network racks, and rack cabinets. Compatible with most 2-post and 4-post rack enclosures for flexible installation Ventilated Rack Shelf for Improved Airflow: Bottom and side ventilation slots promote airflow and heat dissipation inside your server rack cabinet to help prevent overheating of networking equipment Twist-Lock Anti-Slip Stoppers: Includes removable anti-slip stoppers that securely lock into place, helping prevent equipment from sliding off the shelf during operation or maintenance Convenient Cable Management: Includes reusable Velcro cable ties for clean cable management inside your network rack enclosure