Model comes in two variants.
First one consists of a couple of objects corresponding to the real slot machine parts and not optimized for STL.
And the second one – is single collapsed mesh with multi-subobject material applied, which was cleaned up and ready for STL (Stereolithography).

This asset consists of a couple of files packed in one .RAR archive:
-        slot_max7.max (not optimized slot model in 3ds max 7 format)
-        slot.obj (not optimized slot model in Wavefront .obj format)
-        slot.3ds (not optimized slot model in 3dstudio dos format)

-         slot_stl.obj (optimized for STL slot model in Wafefront .obj format)
-    slot_stl.3DS (optimized for STL slot model in 3dstudio dos format)
-        render_max9.max   
(complete scene with lighting used to render previews, comes in 3ds max 9 format and Vray as rendering solution)