45cm Plotter Navigation Parallel Ruler Tied-Up Sea Chart Measuring Divider Measuring Tool Features: For transparent , the whole page can be seen. The copper gasket is polished, easy to , lose luster, and for durable . Made of high-quality plastic, it can for ensure durability even under extreme conditions. Good appearance transparency, sturdy and for durable , exquisite, imported printing scale. The manual ruler provides precise measurement through the aluminum chain, providing enough tension for drawing a straight line parallel to another line or reference point. Specifications: Part Name: Parallel Ruler Material: PVC size: approx. 45 cm/17.72 inches Color: transparent Package Contents: 1 Parallel Ruler Note: Please allow 1-2 cm error due to manual measurement, please make sure you do not mind before ordering. Due to the difference between monitors, the image may not reflect the actual color of the product.