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: Engineer/DIN ISO 5455. Scales: 5:1, 2:1, 1:1, 1:2, 1:5, 1:10, 1:20, 1:50, 1:100, 1:500.