A hub D3
A hub with a dihedral group of symmetry of type D3 (if we ignore the central mark...).
From the point of view of topology, it is a surface of genus 6, that can be thought as a doughnut with six holes, or as a sphere with six handles attached.
© matematita
The image belongs to the sections...:
*3. (D3) (Symmetry)
Rims (Anthology of images)
Rims (Symmetry)
Objects (Topology)