Open Center ProtractorOpen-center plastic protractor perfectly fits the needs of young mathematicians. Black-scored graduations molded into the transparent frame ensure crystal-clear measuring. Ruler base lists both metric (centimeters) and standard (inches) systems. Degree Graduations: 1°; Material(s): Plastic; Ruler Size: 4" Ruler Edge; Color(s): Clear.
Charles Leonard Open Center Protractor, Plastic, 4" Ruler Edge, Clear