The Cortical Stack is a storage device used to store the human mind and memories of the person to which it is implanted in. It is implanted where the spinal cord meets the brainstem and is used as a means of being immortal.
Dimension of the assembled prop are:
44mm by 45mm with a height of 21mm
The file prop comes in 2 parts, there are 2 holes on each part for 5x3mm magnets with the height off. The holes will probably be drilled out a bit.
The stack is perfectly sized to fit a small battery and a few leds (3.2mm).