3D model for CNC machines and printing. The file in 3dm format is available for editing. Model volume (for ring size 19,5 mm): 514.39 cubic mm. Approximate metal weight (for ring size 19,5 mm) : gold 14k – 6,8 grams; gold 18k – 7,9 grams; silver 925 - 5,4 grams. Ring sizes inner diameter: 15|15.5|16|16.5|17|17.5|17.8|18|18.5|19|19.5|20|20.5|21|21.5|22. Model availible in STL format for prototyping. Geometry is healed, and fixed all the bad with Magics software.