double face ring 3D print model

this ring is printable and castable in any material. the volume of the ring is 412.434219 mm3 General information about this mesh: Mesh does not have any degenerate faces. Mesh does not have any extremely short edges. Mesh does not have any non manifold edges. Mesh does not have any naked edges. Mesh does not have any duplicate faces. Mesh does not have any faces with directions different from the mesh as a whole. Mesh does not have any self intersecting faces. Mesh does not have any disjoint pieces. Mesh does not have any unused vertices.

Geometry: Valid mesh. Closed polygon mesh: 89151 vertices, 90695 polygons with normals bounding box: (-10.6267,-5.37912,0.338748) to (10.6184,5.53366,22.6474)