50 Pack Black Plastic Ruler, 12 Inch Standard/Metric Rulers Straight Ruler Measuring Tool for Student School Office (Black)

50 Pack black plastic ruler, 12 inch standard/ metric rulers straight ruler measuring tool for student school office (black) Specifications: Material: plastic Measure range: 0-30cm/ 0-12 inch Total size: 30.8 x 3 x 0.15 cm/ 12 x 1.2 x 0.06 inch Color: black Widely application: a useful measuring tool for artists, designers, architects, engineers, students and so on; suitable for classroom, school, office, home, etc. Package: bags Package contents: 50 x Black plastic rulers Warm notice: Light shooting and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3 cm.