12-2 gyrochoron

The 12-2 gyrochoron, also known as mobius 12, is a convex isochoric polychoron and member of the gyrochoron family with 12 ridge-tritruncated wedges as cells.

Each cell of this polychoron has mirror symmetry, with 2 decagons, 7 tetragons, and 2 triangles for faces, and shares a face with every other cell.