This is modular 3d esael model. Dimensions are inch. You can change the parts.

Formats:

OBJ (.obj, .mtl) (3 files)310 KB
DXF 2015 (.dxf)1.27 MB
Autodesk FBX 201 (.fbx)299 KB
3D Studio 20 (.3ds)125 KB
Stereolithography 2015 (.stl)180 KB