Features: Our architectural scale ruler is crafted from aluminum alloy, light in weight, not easy to fade or break, convenient to carry and store. Clearly scale markings for absolute precision and accuracy. 300mm triangular architectural scale ruler is designed to facilitate the drafting and measuring of architectural drawings, such as floor plans, blueprints, and architectural project. These architect scale rulers includes commonly used scales: 1:20, 1:25, 1:50, 1:75, 1:100, 1:125, OR 1:100, 1: 200, 1:250, 1:300, 1:400, 1:500. Not need to waste time figuring out how to measure each increment. Scales labeled two ways to be easily read from right to left or left to right. Sharply graduations and precise markings for high accuracy makes this ruler professional. Practical measuring tool for any architect. Multipurpose measuring tool drafting ruler for any project. Great for Architects, Engineers, Draftsmen and students. Specifications: Color: Golden; Black Component: Aluminum Alloy Size: Approx. 2.5x32.2cm/0.98x12.67in Weight: Approx. 105g Package Includes: 1Piece Drawing Ruler note: 1.Please allow 0-1cm error due to manual measurement. Be sure you donot mind before bid. 2.Due to difference between different monitors, the picture may not reflect the actual color