Synology RKM114 1U Fixed Rail Kit, Supports 15-series RX415, 14-series RS814(RP)+, RS814, 12-series RS812(RP)+, RS812, 11-series RS411, 10-series RS810(RP)+, RX410, 9-series RS409(RP)+, RS409, RX4. Install your Synology RackStation in a rack. Synology rail kits are used to install your RackStation on the rack. The RKM114 kit keeps your RackStation on the rack. Designed exclusively for RackStation brand Synology they will bring you complete satisfaction.