Weems & Plath Marine Navigation Parallel Ruler (Aluminum Arms, 15-Inch) Go to amazon.com Related posts Top 11 best parallel ruler small: Which is the best one in 2022? FeatureBrushed aluminum armsPolished aluminum handlesMilled with bevelled edgesIncludes protractor scale Description15 inch length, 0.22 inch thickness, aluminum arms and handles. Wt. 7.5 oz.