Stock up and save on bulk purchases of the classic measuring tool. Each ruler has dual scales and measures 12" or 30 cm. The Safe-T plastic is a flexible and shatter-resistant plastic won't break when bent. Includes 24 rulers in assorted colors: red, orange, yellow, green, blue, and purple. For over 50 years, hand2mind has encouraged hands-on learning and discovery, driving deeper understanding and helping children unlock their full potential. Hand2mind specializes in math manipulatives designed to help students learn by doing. Particularly with learning shapes, hand2mind has you set with geometry sets, compasses for geometry, protractors, rulers and all necessary school supplies. From early math to middle school math, hand2mind has you covered with products designed to enhance learning in the classroom and the world around us. Through hands-on exploration and discovery we strive to find new ways to encourage students in math practice, literacy activities, STEM education and more!