Medial transitional 15-4 bigyrochoron

The medial transitional 15-4 bigyrochoron is a convex isochoric polychoron with 30 identical cells.

Each cell of this polychoron has bilateral symmetry, with 2 mirror-symmetric hexagons, 1 rhombus, 2 kites, 2 isosceles triangles, and 4 scalene triangles for faces.