Description 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 a good measurement tool for you. Don't hesitate.- measuring rolling roller Features -Color:Transparent -Material:Plastic -Size:30.00X6.50X2.00cm/11.79X2.55X0.79in -Size:15.00X6.00X2.00cm/5.89X2.36X0.79in -With this parallel roller ruler, your drafting work will be much more easier and efficient.- Durable Ruler Tool -An excellent universal tool for making technical drawings parallel lines, hatching, circles etc.- Rolling Ruler for Drawing Design -Clear metric parallel multi-purpose drawing rolling ruler, Made of clear impact plastic to be small and lightweight.- Rolling Roller for Students -There are various formulas on the roller, which can be calculated quickly in use.- Ruler for Angle Measurement -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 too smooth.- Parallel Ruler 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 too smooth.- rolling ruler for engineers Transparent material allows you to draw without ignoring some important figures or words.- Angle Scale Clear scale for easy reading, the parallel ruler has high accuracy and easy to use. Made of safe and reliable material, durable for use. - Multi-purpose Drawing Ruler Best for drawing, charts, angles, horizontal lines, circles, graphs, musical-note etc.- Rolling Ruler Tool Clear metric parallel multi-purpose drawing rolling ruler, Made of clear impact plastic to be small and lightweight.- drawing design ruler