Synology Rail Kit RKS-02 enables easy maintenance access for Synology rackmount models. RKS-02 is backed by Synology's 1-year limited warranty. Compatibility: - FS series:FS3400, FS3017, FS2017 - SA series:SA3400, SA3200D - 22 series:RX1222sas - 21 series:RS4021xs+, RS3621xs+, RS3621RPxs, RS2421RP+, RS2421+, RS1221RP+, RS1221+ - 20 series:RS820RP+ - 19 series:RS1619xs+, RS1219+, RS819, RXD1219sas - 18 series:RS3618xs, RS2818RP+, RS2418RP+, RS2418+, RS818RP+, RS818+, RX418 - 17 series:RS18017xs+, RS4017xs+, RS3617xs+, RS3617RPxs, RS3617xs, RX2417sas, RX1217sas, RX1217RP - 16 series:RS18016xs+, RS2416RP+, RS2416+, RS816 - 15 series:RS815RP+, RS815+, RS815, RX415 - 14 series:RS3614xs+, RS3614RPxs, RS3614xs, RS2414RP+, RS2414+, RS814RP+, RS814+, RS814, RX1214RP, RX1214 - 13 series:RS10613xs+, RS3413xs+, RX1213sas - 12 series:RS3412RPxs, RS3412xs, RS2212RP+, RS2212+, RS812RP+, RS812+, RS812 - 11 series:RS3411RPxs, RS3411xs, RS2211RP+, RS2211+, RS411, RX1211RP, RX1211 - 10 series:RS810RP+, RS810+, RX410 - 9 series:RS409RP+, RS409+, RS409, RX4