COUPLE BANDS 3D print model

1) .Stl and .obj files are attched herewith. 2) The Rings are solid and suitable for investment casting. 3) The total polygon count of mesh is 0.1 million . 4) Volume of the closed solids = approx 701mm3 for the pair. 5) Mesh is 3d printable and castable and diamonds are of 1.4 mm.6) The Current sizes of the ring are : 15.6mm for diamond ring and 20.3 mm for ring without diamonds. 7) Need any help , ready for modification.