Features: Our architectural scale ruler is crafted from aluminum alloy, lightweight, durable, and resistant to fading and breakage, 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 features 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 guesswork during measurement. Sharp graduations and precise markings provide high accuracy, making this an ideal tool for professional use. A versatile drafting ruler suitable for various design and engineering projects. Ideal for architects, engineers, drafters, and students. 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 before purchasing. 2. Due to differences in monitor displays, the actual color may vary slightly from the image.