Ruler 20cm clear plastic

A transparent plastic ruler functions as a measurement and alignment module that can be positioned against a work surface to produce well-defined linear reference edges. Its measurement capability is based on the interaction between the printed scale and the ruler’s structural rigidity, allowing the user to define distances without significant material deflection. In drawing and cutting processes, the ruler serves as a mechanical guide edge that stabilizes the tool’s trajectory and reduces lateral deviation.

The ruler can also be integrated as a temporary support component or spacer in situations where a flat and easily cleanable surface improves process repeatability. The material’s mechanical profile tolerates ordinary loading without notable deformation, ensuring that dimensional accuracy remains consistent across repeated use cycles.

In everyday terms, this device is called a ruler.