Technical Data:
Optical parallels
Check the flatness and parallelism of measuring faces of micrometer
Flatness of A and B: 0.1um
Parallelism between A and B: 0.6um
Applicable micrometer: 75-100mm
Parallels included (b): 90.62mm, 90.75mm, 90.87mm, 91.00mm

Dimensions:
D=50mm