18-2 gyrochoron

The 18-2 gyrochoron, also known as mobius 18, is a convex isochoric polychoron and member of the gyrochoron family wih 18 ridge-sextitruncated wedges as cells.

Each cell of this polychoron has mirror symmetry, with 2 hexadecagons, 13 tetragons, and 2 triangles for faces, and shares a face with every other cell.