Heptagrammic antiprism

The heptagrammic antiprism, or shap, is a prismatic uniform polyhedron. It consists of 14 triangles and 2 heptagrams. Each vertex joins one heptagram and three triangles. As the name suggests, it is an antiprism based on a heptagram. It is one of three heptagrammic antiprisms, the other two being the great heptagrammic antiprism and the great heptagrammic retroprism.