White dimensionally stable plastic. The precision divisions are numerated both ways. Dimension markings in (cm) & (m) for easier working. With 2 coloured flutings. Ruler Type: School. Scales: 1:10, 1:20, 1:25, 1:331/3, 1:50, 1:75, 1:100, 1:200, 1:250, 1:500, 1:750.