A Möbius strip with finite thickness.
Prismatic Ring
See also
Möbius StripExplore with Wolfram|Alpha
References
Gardner, M. "Twisted Prismatic Rings." Ch. 5 in Fractal Music, Hypercards, and More Mathematical Recreations from Scientific American Magazine. New York: W. H. Freeman, pp. 76-87, 1992.Referenced on Wolfram|Alpha
Prismatic RingCite this as:
Weisstein, Eric W. "Prismatic Ring." From MathWorld--A Wolfram Web Resource. https://mathworld.wolfram.com/PrismaticRing.html