Császár polyhedron

The Császár polyhedron. Like the tetrahedron, this polyhedron has no diagonals. Every line through two vertices is already an edge. It is genus 1, meaning there's a hole through the center. It has 7 vertices and 14 triangular faces.

This is a rather challenging model to print well because it has a couple of very sharp edges. I printed it on a Form 2 using Clear V2.