Red Strong & Flexible Polished: Pinkish red, richly colored nylon plastic with a smooth finish.
About this Product
A physical interpretation of a drawing by the same name published in the 1940 book "Mathematics and the Imagination." The toy features a hole through a hole in a hole...kinda mind-bendy.
Order in "Frosted Ultra Detail" for the best possible finish, or in the Strong and Flexible plastics for color.