This Supermicro 1U Rail Kit (MCP-290-00056-0N) has a 1U chassis handle and a quick inner and outer rail release. The rail kit is compatible with CSE-512F, 515, 813-816 and can extend up to 26.4" in length. This Supermicro rail kit has been fully tested and validated by Supermicro to ensure the best quality. This rail kit includes*: •Outer Rail: 2 x MCP-290-00104-0N *Individual SKUs not sold separately *All the installation instruction could be found in the chassis or system manual Manufacturer Supermicro Outer Rail Extendable Length 19.6” to 27” Rail Kit Type Rail Kits Designed For 1U Compatible Chassis SC512F, 515, 813, 813M, 814, 815, 816, 818, 819, 808, 809, 113, 113M Mechanism Linear Friction Rail Warranty 1 year warranty Product Environmental Compliance RoHS and REACH compliant, details available upon request