Sturdy:1U Server Rack Shelf is made of 1.5MM thickness cold rolled steel, weight load capacity is 110lbs(50kg); Electrostatic powder coat preventing rust and corrosion Design Features:No lip design accommodate different devices;Anti-slip stops can fix and prevent equipment from slipping; Velcro cable ties are convenient for cable management Ventilation:vented shelves increases ventilation efficiency and heat dissipation to protect equipments long-term use Installation:Server rack shelves are easy to install,with instructions or videos for reference;EIA/ECA-310-E Compliant Application:Server rack tray fits all 19" racks and cabinets to hold various IT, network, and AV equipment;multiple specifications and packaging options to choose