1) .Stl and .obj files are attched herewith. 2) The Ring is solid and suitable for investment casting. 3) The total polygon count of mesh is 0.5 million. 4) Volume of the closed solid = approx 120 mm3 for single ring. 5) Mesh is 3d printable and castable. 6) The Current size of the ring is 16 mm. 7) Need any help , ready for modification.