The Szilassi polyhedron Free 3D print model

The Szilassi polyhedron is a nonconvex polyhedron, topologically a torus, with seven hexagonal faces. Each face of this polyhedron shares an edge with each other face. The tetrahedron and the Szilassi polyhedron are the only two known polyhedra in which each face shares an edge with each other face.https://en.wikipedia.org/wiki/Szilassi_polyhedron