17-2 gyrochoron

The 17-2 gyrochoron, also known as mobius 17, is a convex isochoric polychoron and member of the gyrochoron family with 17 ridge-quintitruncated edge-truncated tetrahedra as cells. It can also be constructed as the 17-8 gyrochoron.

Each cell of this polychoron has mirror symmetry, with 2 pentadecagons, 12 tetragons, and 2 triangles for faces, and shares a face with every other cell.