28 Pack plastic protractors: made of clear plastic with smooth surface, durable; The black marking is not easy to abrade and adequate quantity can serve for a long time Clear protractor: transparent color allow you to see the words, letters, figures through the tool, you can get the information accurately and quickly Proper size: the bottom side length is 10 cm, 4 inch proper size for carrying conveniently and make it easy to put on your books, notebooks and pencil case Good design: range of 0 to 180 degree, accurate to 1 degree, each 10 degree have a clear line to distinguish, helps you deal with the math problems efficiently Practical measure math tool: the geometry protractors are suitable for painting, measure, homework, technical drawing; Abundant bulk, you can send them to your friends and classmates
