Heptagonal duoprism

The heptagonal duoprism or hedip, also known as the heptagonal-heptagonal duoprism, the 7 duoprism or the 7-7 duoprism, is a noble uniform duoprism that consists of 14 heptagonal prisms and 49 vertices. It is also the 14-6 gyrochoron. Together with its dual, it is the first in an infinite family of heptagonal dihedral swirlchora.