This is a digital download:
 
Spiral Staircase pack with 6 different types of Stairs from 90 to 360 degree turn with various sizes.  The model is exported in various formats. Model is organized by layers so you can apply your own materials.
 
This is perfect for Architects, Students, Engineers who want a completed model for their library, or project.  
 
3DM - Rhino
3DS
DWG
OBJ
STL
 
Ask me about other formats.  If you have questions or issues, send me a message.