Off white dimensionally stable plastic ruler. Precision divisions are numbered both ways. Dimension markings are in metric for easier working. Two coloured flutings. Scales: 1: 10, 1: 15, 1:20, 1: 25, 1: 33.3, 1: 50, 1: 100, 1: 150, 1: 200, 1: 250, 1: 500.