VERSATILE FIXED SHELF: Ideal for mounting towers, printers, desktops, and other non-rack mountable equipment; Supports up to 150 lbs (68 kgs) STURDY CONSTRUCTION: Made from US steel for durability and reliability; Includes anti-slip mat to secure equipment COMPATIBLE WITH VARIOUS RACKS: Fits any 2Post or 4Post rack with square, round, or threaded holes ADJUSTABLE MOUNTING DEPTH: Adjustable from 3 - 25' (279 - 635 mm) to accommodate different rack depths FLEXIBLE INSTALLATION OPTIONS: Can be mounted flush or center-mounted in 2Post racks, or used in 4Post racks as an alternative to rails