"Clear plastic protractor is ideal for all young mathematicians. Sharply defined graduations allow students to easily identify angles ranging from 1 to 180 degrees. Metric and SAE graduations along 6"" ruler base. Degree Graduations: 1°; Material(s): Plastic; Ruler Size: 6"" Ruler Edge; Color(s): Clear. Total Recycled Content Percent: 0 percent. Package includes 12 open center protractors. Gender: unisex."