Inking templates are essential tools for technical drawings and other creative projects that call for precision. This inking template features circles with diameter sizes range from 0.06" to 1.38", with 0.06" to 0.34" in 0.02" increments, 0.38" to 0.75" in 0.03" increments, 0.81" to 1" in 0.06" increments and 1.13" to 1.38" in 0.13" increments. Details:GreenIncludes multiple sizesTemplate R-40Durable plastic constructionFor use with pen or pencil