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 3 large circles are the nearest face to the projection point, which is centered on one face, at the 'north pole' of the hypersphere. The 'wires' are 1.8 mm in diameter to be printable in metallic plastic (upsized due to printing issues).