Steel Rules Imperial And Metric Front side figured in inches 16ths, 32nds, 64ths, 10ths, 20ths, 50ths and 100ths. Reverse side figured in millimetres 0.5 and 1.0. 491055 Model ER106F ER112 ER206F ER212 ER424 Length (mm) 150 300 150 300 600 (in) 6 12 6 12 24 Width (mm) 19 25 12.5 12.5 25 Price Each Order Code 137-6848 137-6849 137-6850 137-6851 137-6852 Metric Both sides figured in millimetres 0.5 and 1.0. Price Each Model ER306F ER312 Length(mm) 150 300 Width(mm) 19 25 Order Code 137-6853 137-6854