For installing your Synology RackStation in a rack. Synology Rail Kits are designed for installing your RackStation on the rack. Synology RKS1314 comes with sliding rails, making it easy to slide the RackStation in and out for easy maintenance, while Synology RKM114 secures your RackStation on a rack. Physical specifications for Synology RKM114. – Mount post width must be equal to or greater than 451mm. – Panel width must be equal to or greater than 480mm. – Cabinet depth: 570mm~720 mm (for 13-series and earlier 1U models). – Cabinet depth: 570mm~810mm (for 14-series and future 1U models).