Enneagonal duotegmatic alterprism

The enneagonal duotegmatic alterprism is a convex isogonal polyteron that consists of 2 enneagonal duotegums and 162 isosceles triangular-triangular duotegums. 2 enneagonal duotegums and 27 triangular-triangular duotegums join at each vertex. It can be formed as an alterprism of a enneagonal duotegum, or as the hull of two dually oriented enneagonal disphenoids.