Colour: BLACK + GRAY

Control points: 21

**PIRLA #4108 - 21, BLACK + GRAY - 2022.** 99x99 PIRLA is a collection of 9801 unique generative spinning tops. 99 colours. Each three-dimensional rotational solid is generated by a nurbs of 10 to 37 geometrical control points. [https://pirla.re/99x99/4108](https://pirla.re/99x99/4108)