Metric Scale Aluminum Triangular is graduated 1:100 1:200 1:250 1:300 1:400 1:500. These metric engineers scales by Alumicolor are great for metric engineering drawings. The scales are lightweight, professional quality and made from color anodized aluminum with a solid core. Printed graduations on ultra smooth, mark resistant surface. The scales are available for custom imprint as well in multiple colors. Promotional Products Store the source for custom imprinted products with a lasting value and long term presence.