The 4POSTRACK12 12U Adjustable 4 Post Server Equipment Open Frame Rack Cabinet provides a durable open air housing for rackmount servers and networking equipment.The equipment rack/cabinet features heavy gauge mounting rails to ensure a stable installation platform and adjustable posts for flexible installation. The 12U open frame rack is compliant with EIA-RS-310C standards offering a universal design that\'s compatible with equipment from popular manufacturers. Plus the equipment rack is flat-packed reducing shipping costs and simplifying handling and assembly.For added versatility StarTech.com offers an optional 4pc Caster Kit (4POSTCASTER) that can be installed on the bottom of the 12U server rack making it easier to re-position the cabinet/rack as needed for future uses.Backed by a StarTech.com lifetime warranty and free lifetime technical supportThe StarTech.com Advantage Heavy duty pre-drilled base allows a user to bolt down the rack for situations where heavy equipment might otherwise tip overOpen frame design lets you easily route manage and access your equipment cables without any obstructionFlat pack packaging for easy shipping to any location .