The aim of this unit is to test whether the outside diameter of the tested sample is within standard or not.

- Judgment of reference: the samples must adapt to the larger hole, while the samples must not adapt to the small hole.

- It can be custom-made as different diameters in numbers of holes. Inquiry


The aim of this unit is to test whether the outside diameter of the tested sample is within standard or not.

- Judgment of reference: the samples must adapt to the larger hole, while the samples must not adapt to the small hole.

- It can be custom-made as different diameters in numbers of holes.