This Supermicro 4U-5U Rail Kit (MCP-290-00059-0B) has a 4U/chassis handle and a quick inner and outer rail release. The rail kit is compatible with CSE-747 and can extend up to 36.4" in length. This Supermicro rail kit has been fully tested and validated by Supermicro to ensure the best quality. This rail kit includes*: •Inner Rail: 1 x MCP-290-00115-0N •Outer Rail: 1 x MCP-290-00117-0N *Individual SKUs not sold separately *All the installation instruction could be found in the chassis or system manual Manufacturer Supermicro Outer Rail Extendable Length 26.5" to 36.4" Rail Kit Type Rail Kits Designed For 4U-5U Compatible Chassis CSE-747 Mechanism Ball-Bearing (Support Round Hole Racks with Adapter MCP-290-00060-0N) Warranty 1 year warranty Product Environmental Compliance RoHS and REACH compliant, details available upon request