4.SPECIFICATION 15cm clear ruler; 20cm clear ruler; 30cm clear ruler 1cm in thickness A good measuring tool, easy and to use 2.PORTABLE AND premium acrylic,, lightweight and 1.PRACTICAL SET This clear acrylic ruler comes with accurate scales, three types for you to choose Simple and practical 3.CLEAR AND ACCURATE SCALES Translucent color allows for a clear view of numbers and letters on the page, unnecessary eye strain With the clear and accurate mathematics ruler, you can measure an object easily 5.WIDE APPLICATION A useful and practical measuring tool for artists, designers, architects, Engineers, students, teachers and so on Compact and portable for Ideal for classroom, school,, home, Manufacturer: KAHDGSS