[9 different models] Included: multi-functional drawing model, circle model, math learning model, building model, geometric drawing model, electrician model and 3pcs curve model [High quality] Made of high quality plastic, strong and durable, lightweight, good flexibility, with smooth inking edges, transparent orange, long service life [Size] Pattern rulers adopt the metric system unit, take centimeter as unit, length ranges from 17.8-25cm/7-9.84in, width ranges from 9.4-14.7cm/3.7-5.8in [Easy to use] Contains different sizes of circles, ellipses, squares, triangles and hexagons, can help design different graphics, and with a plastic zipper bag, convenient for storage and carrying< /p> [Applicable] Suitable for individual use, classroom use, or other detail work, such as design, architecture, etc. re, circle models, mechanical engineering and network technique, fractional measurement at school and in the office, etc