Check the listing for details. Triangular Engineering Scale Aluminum Ruler for Architects Engineers and Student. Condition: New. Listed at 16.41 USD. Triangular Engineering Scale Aluminum Ruler for Architects Engineers and Student ALL THE SCALES YOU NEED IN ONE PLACE - The 12" TruScale Engineers triangle ruler provides 6 total scales. 1:10, 1:20, 1:30, 1:40, 1:50, 1:60 HIGH QUALITY CONSTRUCTION - Made of solid (not hollow) high grade anodized aluminum, youll immediately notice the heavier weight and durability youre looking for. PROFESSIONALLY PRECISE - Created and quality checked for supreme accuracy with exact measurements. EASY TO USE AT A GLANCE - Color coded grooves allow you to quickly and accurately scale drawings. Triangular Engineering Scale Aluminum Ruler 0.94 inches x 12.8 inches x 0.91 inches. Weight: 3.84 oz Style triangle ruler Graduation Range 12 Inches Color Aluminum Material Aluminum Material Type Aluminum Manufacturer Part Number TSR01 Item Weight 3.84 ounces Package Dimensions 12.8 x 0.94 x 0.91 inches Size Engineer Scale Ruler