The assembly consist of 4 files and 7 parts. 

1*Center link(measured):
150mm
1*medium link
100mm
1*small link(driven):
50mm

4*Standard pin:
press fit 

-center holes should fit a pencil

Note: The bottom link will be 100mm , holes are placed in the "standard pins" of small bar and medium so that paperclips, or thumb tacks can be inserted to assembly 4th bar. 

classification: crank-rocker-rocker 4 bar.   


