UNIVERSAL 19' FIT: 1U 4-post vented rack-mount shelf fits EIA-310-compliant 19-inch server racks/cabinets; Adjustable mounting depth range of 6.4in (16.3cm); Usable mounting area of 17.1x27.5in (43.5x70cm) to support various equipment sizes ADJUSTABLE DEPTH: Customize the mounting depth from 28 to 34.4in (71 to 87.3cm) to fit racks or cabinets of various depths, ensuring a secure and tailored fit; The rear mounting brackets feature multiple slots to accommodate the required mounting depth MAXIMIZE VENTILATION: The venting holes help promote passive airflow for optimal heat dissipation, maintaining consistent temperatures for the mounted equipment DURABLE DESIGN: Made of cold-rolled steel, the sturdy cabinet shelf is designed for long-term durability; Max weight capacity of 150lb (68kg); M5 cage nuts and screws are included VERSATILE FUNCTIONALITY: Designed to fit in 4-post server racks, the tray provides storage space for tools and accessories, improving workspace efficiency and accessibility; Use for non-rack mountable equipment such as KVM, modem, router, UPS, and others.