Fits 19" Standard Equipment,1U 4-post vented rack-mount shelf fits 19-inch server racks/cabinets; Adjustable mounting depth range of 13.75-20.5in to support various equipment sizes. This rack mount shelf is made with Premium quality craftsmanship,Cold Rolled Steel Made. Powder coated finish that protects them from rust and corrosion, With supporting heave duty over 300LBS The thickness of the steel plate reaches 2MM (0.08 inch). Surface venting holes help promote passive airflow for optimal heat dissipation, maintaining consistent temperatures for the mounted equipment，This product stylish rack shelves design meets high industry standards.making it perfectly compatible with 19" server rack/server Cabinet/wall mount equipment. 1u rack shelf size: 19in cabinet shelf H: 1.75"/D: 13.75" - 20.5"(Adjustable size). Server tray is backed for 2-years， GlobalRack 1U 19in server rack shelf are built to industry high standards.Serve with square screw holes, Also M6 screws and cage nuts are included. GLOBALRACK Server Rack Shelf/rack mount shelf,Solid, Versatile , This premium quality 1U Server shelf is designed to fit different installation depth of racks and cabinets. The depth can be adjusted from 13.75 to 20.5in.Surface venting holes help promote passive airflow for optimal heat dissipation.Made of quality cold rolled thickness of the steel plate reaches 2MM (0.08 inch). with a powder coated finish that protects them from rust and corrosion. premium quality craftsmanship, heavy duty up to 250lbs weight capacity.easy to mount on a 19" standard rack or cabinet. it provides you with exceptional stability.Making it perfectly compatible with server rack/server Cabinet Equipment.Mounting screw kit is included.