Covered with clear transparent plastic. One side is fully divided into millimeters. The other side is graduated into inches. One edge has raised lip for inking.
- Covered with clear transparent plastic.
- One side is fully divided into millimeters.
- The other side is graduated into inches.
- First 6" are sub-divided into 32nds, and the remainder into 16ths to the inch.
- One edge has raised lip for inking.
