This is a fan hoder for Kossel printers. It is designed to cool a ramps1.4 board that are mounted inside the frame.
It is made to fit two two 30x30mm fans, one 115/230V no/off switch and has a hole for the power cabel.
To fasten the holder I used four 4x12mm Allen screw. (Hex)
You kan fint the ramps1.4 box on this link:
http://www.thingiverse.com/thing:2312630