THE BPU-124DE-SS
The body of the BPU-124DE-SS is almost completely made by aluminum and measures 180.1mm in length, 146mm in width and 41.9mm in height.
A total of 4 perforated doors are placed at the front each of which has its own lock and activity LEDs.
Unlike the BPN-2535DE-SA however the BPU-124DE-SS features 4 removable drive trays so you need to use the bundled screws to mount each drive (we liked the trayless BPN-2535DE-SA more in that aspect).
One of the very nice features of the BPU-124DE-SS is that you can mount both SATA and SAS drives inside.
As you can all see the cage uses the same mounting holes as a normal 5.25" drive so even locking tool-free mechanisms work fine.
At the rear of the cage we see 4 SATA data connectors, a single SATA power connector, two 40mm exhaust fans (3500RPM) and a switch with which you can turn off the front LEDs.