2200M metric engineering scales are made of solid anodized aluminum. These Alvin scales have a large profile, solid core and tapered edges and are printed with black graduations. Perfect for engineers and metric engineering drawings. The 2200M series is also available in a inch version and architectural version. Metric Graduations: 1:20, 1:25, 1:50, 1:75, 1:100, 1:125