Staedtler 9871837 Combination 12 Inch Scale

Features colored grooves on a white plastic triangular scale. Calibrated Architect side: 1, 1/2, 1/4 and 1/8. Mechanical Engineer's side: 3/4 size, 1/4 size, 3/8 size, 1/2 size. Mechanical Drafting side: 16 and 50. Colored grooves are Red, White and Blue. Made in Germany.