This is part of a casing for a LED based photometer, developed as a project at the Univerity of applied sciences and arts in Coburg Germany.
The File contains the socket for holding an arduino servo mortor. The motor sets LED emitters unto optimal position towards the beam path.
This part is designed to sit very tight within the main part most likely needs some post processing for a perfect fit.
The original .stl file can be easily converted into a 3D printer usable format.