I am selling an Ocean Optics FOIS-1 Fiber Optic Integrating Sphere Insert set.  You get the two white inserts only.  The blue housing you see in the third picture is NOT included.   These are genuine Ocean Optics inserts and are the ones they use in the FIOS-1 model.  One of these complete integrating spheres just sold on Ebay for $399 so feel free to look at Ebay item # 162597233408 to see for yourself.  As you can see, the main and critical part of the integrating sphere are the inserts so if you have the inserts it shouldn't be too hard for the new owner to make a housing for them.  Thank you.