In the Dimensional laboratory the unit of length, meter (m), is realized using two He-Ne iodine stabilized lasers. Furthermore, the laboratory is equipped with a gauge block interferometer, gauge block comparators, an autocollimator and an indexing table, a universal one dimensional measuring machine, a three dimensional coordinate measuring machine, a roundness measuring machine, as well as roughness measuring systems. Some of the calibrations and measurements performed in the laboratory are: