Rail Kit Mounted Mounting stand width must be at least 451 mm Plate width must be at least 480 mm Cabinet depth: 570mm~720 mm (for 13-series and earlier 1U models), cabinet depth: 570mm~810mm (for 14-series and future 1U models) Suitable for the following Synology NAS models: RS815(RP)+, RS815, RX415, RS814(RP)+, RS814, RS812(RP)+, RS812, RS411, RS810(RP)+, RX410, RS409(RP)+, RS409, RX4