School supplies are often handled by many students throughout the year. To keep harmful bacteria and microbes from spreading, this protractor has antimicrobial protection built in. Features a movable arm for greater accuracy. Soft touch grip and non-slip back for better control. Degree Graduations: 1/2 in; Material(s): Plastic; Ruler Size: 6" Ruler Edge; Color(s): Blue; Green; Gray; Pink.