Micrometer Size: 1-2"
157-115 Mitutoyo Optical Parallel: 1.0125"
The Mitutoyo 157-115 optical parallel has the following specifications:
Parallelism check between measuring faces by means of interference fringe produced by an optical parallel.
The parallelism between the measuring faces can be determined as follows:
Mitutoyo Individual Optical Parallels and Optical Parallel Sets: