To help reduce the amount of time required to properly install DellÃ¢âÂ¢ components into rack cabinets, use Dell Rack Rail Kit. These rails allows virtually tool-less installation of Dell equipment. This universal rail kit is designed for installation with racks virtually meeting any specifications. This product has been tested and validated on Dell systems. It is supported by Dell Technical Support when used with a Dell system. You have to consider the rack accessory type and size of the rack when determining which accessory to select. Sometimes it is also important to know whether the rack is a 2-post or 4-post product. These attributes are listed in the Tech Specs section of this page. We recommend that you use the System Drill Down functionality in the Parts For Your DellÃ¢âÂ¢ tool to order your Rack Accessory. Refurbished Spare Parts are parts retrieved from Dell-branded systems that have been returned, some of which have never been used. All Dell refurbished spare parts are certified to comply with all original Dell factory performance specifications and come with a 90-day limited hardware warranty. DellÃ¢â¬â¢s limited hardware warranty covers defects in materials and workmanship in your Dell-branded hardware products. For additional details on our warranty services, please visit www.dell.com/warranty.