Alvin black aluminum architect's scale ruler. High-quality black anodized aluminum architectural drafting ruler has a large profile, hollow core, and tapered edges. Printed white graduations and colored (red, green, yellow) inlaid furrows. 3/32, 3/16, 1/8, 1/4, 1/2, 1, 3/8, 3/4, 1-1/2, 3 inches to the foot, left to right calibrations. Includes nice plastic storage case. Quality, durable Alvin 98/ARC black aluminum architect scales are made in Germany.