This is a drive tray lock key for Synology NAS. The compatible Synology NAS models are as follows. This is a new, unused item, as it was included in a maintenance kit but not used. ○ Compatible Synology NAS ・DiskStation Value Series: DS418play, DS418, DS1817 ・DiskStation Plus Series: DS720+, DS420+, DS920+, DS718+, DS918+, DS1019+, DS1618+, DS1819+, DS2419+, DS620slim ・DiskStation XS Series: DS3018xs, DS3617xs ・RackStation Value Series: RS217, RS819 ・RackStation Plus Series: RS818(RP)+, RS820(RP)+, RS1219+ ・RackStation XS Series: RS1619xs+ ・FlashStation Series: FS1018 Other models that use a hex drive bay lock Shipping will be via Mini Letter. Anonymous shipping is also available for an additional 150 yen, but please contact me in the comments before purchasing. Instant purchase is OK. Even if there are ongoing conversations in the comments, the first person to purchase will be given priority.