Triangular double triswirltegum

The triangular double triswirltegum is a convex isochoric polychoron with 54 identical cells. It is the third in an infinite family of isochoric triangular tegmatic swirlchora.

Each cell of this polychoron has mirror symmetry, with 1 octagon, 4 hexagons, 2 pentagons, 2 tetragons, and 4 triangles for faces.