Symmetric Canonical Self-Dual Enneahedra

11 total:  3 

2 have C4v symmetry:  2 

This is the only one with 4 edge lengths

(box: x-ray)  (F: faces)  (slider: perspective)  (image: L=rotate R=zoom)  (M: metrics)

Self-Dual Enneahedron #3 (canonical)