The file 'Ultimaker Cooling Board 3D Printer Model' is (stl) file type, size is 34.1KB.
This is a drop in replacement of the Original Ultimaker Cooling Board. This is what cools the stepper drivers and keeps them running smoothly.
I have a YouTube video giving more instructions here:
http://youtu.be/vEo38GHzh8s
Ultimaker_Cooling_Board.stl | 137.0KB |