If you are still searching for a durable parallel-scale drawing roller, then you should not miss this perfect product. This roller ruler is made of plastic material, so it is lightweight and portable for you to carry around. And it will be a good measurement tool for you. Don't hesitate. Features -Color:White -Material:Plastic -Size:30.50X6.00X2.00cm/11.99X2.36X0.79in -With this parallel roller ruler, your drafting work will be much more easier and efficient. -An excellent universal tool for making technical drawings parallel lines, hatching, circles etc. -Clear metric parallel multi-purpose drawing rolling ruler, Made of plastic to and lightweight. -There are various formulas on the roller, which can quickly in use. -This rolling ruler is only suitable for use on surfaces with relatively large friction such as drawing paper and canvas, and not suitable for use on surfaces that are . Package list: 1 x Multi-purpose Rolling Ruler