Metabiaugmented hexagonal prism

In geometry, the metabiaugmented hexagonal prism is one of the Johnson solids ($J55 – J56 – J57$). As the name suggests, it can be constructed by doubly augmenting a hexagonal prism by attaching square pyramids ($C2v$) to two of its nonadjacent, nonparallel equatorial faces. Attaching the pyramids to opposite equatorial faces yields a parabiaugmented hexagonal prism. (The solid obtained by attaching pyramids to adjacent equatorial faces is not convex, and thus not a Johnson solid.)