The 600-cell, or icosaplex, is the 4D analog of the icosahedron, and is a convex 4 dimensional regular polytope, with Schlafli symbol {3,3,5}.. It has 120 vertices, 600 tetrahedral cells, 1200 triangular faces, and 720 edges. In this model, it is first projected onto the circumscribing hypersphere in 4D, then projected stereographically into 3D. The largest circles are the nearest edges to the projection point, which is centered in one of the tetrahedral cells, and is the 'north pole' of the hypersphere at {0,0,0,1}. There are 12 edges at every vertex, and the vertex figure is an icosahedron. Because this is a true stereographic projection, all of the angles at the vertices are projected accurately into 3-space.
The 'wires' of this model are 1.52 mm in diameter to be printable in metallic plastic.