20-2 gyrochoron

The 20-2 gyrochoron, also known as mobius 20, is a convex isochoric polychoron and member of the gyrochoron family with 20 ridge-septitruncated wedges as cells.

Each cell of this polychoron has bilateral symmetry, with 2 mirror-symmetric octadecagons, 1 rhombus, 14 kites, and 2 isosceles triangles for faces, and shares a face with every other cell.