Mesh to single NURBS is a standalone application. This software can convert an open mesh to a single NURBS surface just by clicking one button. The feature includes: 1. Import .stl file; 2. Convert mesh to a single NURBS surface; 3. Export the surface to .igs file; 4. Controllable precision. The maximum deviation between mesh and surface can be specified; 5. Controllable smoothness. The surface's smoothness can be adjusted by 5 levels; 6. Handle large scale data. Surface control point number can reach 300X300 which allows to fit large scale data. 7. Easy to use. Just click one button to create surface from mesh.