How to decrease imported model file size

Hello!

In mine company we are switching to SolidWorks from Pro/E, thats why we are useing a lot of imported files. Sometimes some simple model can weight couple tens of MB. Is there any tool to reduce model size. Those model will not be updated and changed in future, so model should be very light. Any idea how to iprove it?

Thanks a lot in advance

sample file:

https://dl.dropboxusercontent.com/u/25508057/delta/CIRC%20BREAK%20GEN%20CBI%20QY%202P.SLDPRT

SolidworksParts And Features