Features: Our architectural scale ruler is crafted from aluminum alloy, lightweight, durable, and resistant to fading and breaking, making it convenient to carry and store. Clear scale markings ensure precise and accurate measurements. The 300mm triangular architectural scale ruler is designed for drafting and measuring architectural drawings, including floor plans, blueprints, and construction projects. This ruler includes commonly used scales: 1:20, 1:25, 1:50, 1:75, 1:100, 1:125, 1:200, 1:250, 1:300, 1:400, and 1:500. Scales are clearly labeled for easy reading from left to right or right to left, eliminating the need to calculate increments manually. Sharp graduations and precise markings provide high accuracy, making this an ideal tool for professional use. A practical measuring instrument for architects, engineers, drafters, and students. Multipurpose drafting ruler suitable for various design and measurement tasks. Specifications: Color: Golden, Black Material: Aluminum Alloy Size: Approx. 2.5 x 32.2 cm (0.98 x 12.67 in) Weight: Approx. 105g Package Includes: 1 Piece Drawing Ruler Note: 1. Please allow 0–1 cm error due to manual measurement. Ensure you are comfortable with this range before purchasing. 2. Due to differences in monitor displays, the actual color may vary slightly from the image.