Holiday Shipping Details & Extended Holiday Returns 
The MB155SP-B built to be a lighter module, while more importantly maintaining the same level of quality, build, and service you'd expect from an Icy Dock product. While the design has gone through some changes, the space saving design is still established. The backplane module allows up to a massive 5 x 3.5" SATA III hard drives, while only consuming three external 5.25" bays.
The FatCage has also been redesigned for the type of power connector accepted. 15 pin SATA is used to provide better accessibility for most modern host systems. They are also compatible with cables with metal latches to improve security when installed into a system.
Along with being a lighter package, the cooling has been redesigned to provide the utmost airflow to your hard drives. The FatCage uses a fully metal body that allows for the effective heat dissipation possible in various types of applications. Meanwhile, our enhanced direct air flow design allows the included a large 92mm cooling fan to raise its efficiency to cool down your hard drives, by closing and rerouting most vents to route incoming air directly to the cooling fan. These are dual exhaust vents on the top and bottom to additionally help keep drives temperatures while improving airflow.
In addition, the backplane logic PCB has larger cut outs in key locations to allow more airflow into and exit the MB155SP-B, making it an ideal system to store and cool your hard drives.
The included 92mm cooling fan is fully modularized for the most hassle free experience of replacing and maintaining and is compatible with most aftermarket cooling fans of the same size. To expand the range of compatible fans, both 2 and 3 pin fan power ports are available and are conveniently located for great accessibility. This provides the user the most flexible options available and freedom desired.
The MB155SP-B uses and interchangeable EZ-Tray drive tray that is compatible with FatCage and DataCage enclosures include DataCage MB876SK-B (1x Drive), FatCage 901SPR (2x Drive w/ HW Raid 1), and MB153SP-B (3x Drives). This allows you to continue using the same trays from these enclosures and exchange drives between the systems without unmounting the drive from the tray.