The measuring scales as replacement scales for the crack magnifiers series RL and RL-B with 0.1 mm and 0.05 mm graduation. The graduation for the magnifiers 6x to 10x is 0.1 mm and the graduation of the crack magnifier RL-12 is 0.05 mm. The measuring lengths vary between 20 mm and 6 mm. The line width of the etched graduation is 0.01 mm for the RL-12 and 0.02 mm for all other models.