Light in weight and portable, these drawing ruler is designed to be resistant to breaking, with clear, easy to read marking for accurate result These math measuring ruler features clear designs that allows for easy reading of measurements, available in four different color to cater to different drawing needs precise measurements with our 30cm Colorful Clear Ruler, crafted from plastics for durability Very suitable for students, teachers, engineers, and craft enthusiasts, these math measuting ruler meets the measurement need of both learning and professional environment Widely use for in school classroom, drafting, and home crafting project, ensuring versatility across various setting, Manufacturer: ERRORY