StarTech.com's 25U 4 Post Open Frame Server Rack is a solid, versatile solution for mounting servers and other networking equipment. Adjustable posts ensure maximum flexibility and heavy gauge mounting rails enhance structural stability. This 25U 4Post Open Frame server/equipment rack offers adjustable posts for maximum flexibility, and an open frame design with heavy gauge mounting rails to ensure exceptional structural stability. To ensure broad compatibility, the rack features an industry stan dard design for compatibility with equipment from popular manufacturers. A cost-effective solution, the 25U 4 Post Open Frame Server rack/cabinet is constructed of high quality materials and is backed by StarTech.com's Lifetime Warranty, plus the rack i s flat-packed for easier handling and assembly. For even more versatility, StarTech.com offers an optional 4pc Caster Kit (POSTRACK) that can be installed to the bottom of the 42U server rack.