DURABLE MATERIAL: Our transparent ruler is made of durable plastic material, with a smooth surface that is not easily deformed or damaged. The plastic rulers remains in good condition even after long-term use, providing you with long-lasting measurement assistance. THE PACKAGE INCLUDES: You will receive a package containing 50 clear rulers. The maximum measurement value of the plastic ruler is 30 cm/12 inches, and the ruler has two scales: centimeters and inches, suitable for measuring most daily necessities. You can also share with family and friends. TWO TYPES OF SCALES: The surface of the clear rulers is engraved with clear and accurate ruler scales to help you accurately measure length, angle, etc., ensuring the accuracy of your drawing, design, or measurement work. There are two types of scales for easy unit conversion. EASY TO USE: Our clear rulers is made of high transparency plastic material, ensuring that you can clearly see the drawings, text, or other content under the desktop, making it easy to measure accurately, saving work time, and improving work efficiency. WIDELY USED: The plastic rulers 12 inch is suitable for students, engineers, designers, artists, architects, and other fields. It can be used for drawing, surveying, mapping, and other work, making it an ideal choice for offices, exhibition halls, schools, and homes., Manufacturer: KOHAND