Free Express Shipping! Synology RX1222sas 12-Bay Expansion Enclosure For the Synology SA3600 and SA3400, 12 x 3.5"/2.5" SAS/SATA Drive Bays, 1 x SAS Input - 1 x SAS Output, Hot-Swappable Drives, Dual Redundant 500W Power Supplies, Supports Hard Drives...