Hendecagonal duotegum

The hendecagonal duotegum, also known as the hendecagonal-hendecagonal duotegum, the 11 duotegum, or the 11-11 duotegum, is a noble duotegum that consists of 121 tetragonal disphenoids and 22 vertices. It is also the 22-10 step prism. Together with its dual, it is the first in an infinite family of hendecagonal dihedral swirlchora.