Material: Made of premium acrylic sheet, high hardness and long service life.Function: Designed to draw lines bearing line or course, the degree or amount of bearing line degree course line.Precise Scale: The scale is engraved, accurate and easy to see. A good accessory for drawing and measurementGood Transparency: Navigation Parallel Ruler has good transparency and does not obscure too much information.Easy to Draw: Two hands each holding a ruler of David, alternately moved in parallel. Sturdy links provide the right amount of tension for drawing a line parallel to another line or reference point.Material: acrylic fiberColor as shownPackage Contents:1 pcs Parallel RulerOnly the above package content, other products are not included.Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.