ALVIN - 98/ENG - Black Series, Triangular Engineer Scale, Made of Aluminum, Multipurpose Drafting Ruler for Drawing, Planning, and Design - 12 Inches
High-quality, black anodized aluminum scales have a large profile, hollow core, and tapered edges. Printed white graduations and color inlaid furrows. Supplied in hard plastic case. All engineer scales have the following graduations unless otherwise noted: 10, 20, 30, 40, 50, 60 parts to the inch.