1) .Stl and .obj files are attched herewith. 2) The Ring and hoops are solid and suitable for investment casting. 3) The total polygon count of meshes are 0.3 million. 4) Volume of the closed solid = approx 485 mm3 for the ring and the hoops together5) Mesh is 3d printable and castable. 6) The Current size of the ring is 17.5 mm. 7) Need any help , ready for modification.