The Synology RKM114 (fixed guide set) consists of two mounting rails and is suitable for the RackStation models RS815 (RP) +, RX415, RS814 (RP) +, RS814, RS812 (RP) +, RS812, RS411, RS810 (RP) X, RX410, RS409 (RP) +, RS409 and RX4 from Synology. These can be mounted on rails with the fixed RKM114, w..