We no longer carry Synology DX1215 - hard drive array (3650983), but we found this replacement for you. Compare the discontinued item to the replacement item:
Know your gear
Synology DX1215II expansion units are designed to provide effortless storage expandability for Synology DiskStations. The modest 12-bay desktop form factor allows for maximum storage scalability while taking up minimal space. Plug it in and start leveraging your storage space thanks to easy installation.