Laser Pinholes

The pinholes themselves are thin precision drilled platinum-iridium discs. They are mounted in holders with 25 mm resp. 9 mm diameter for handling.
The pinholes MLB 1.xxx (25 mm mount) have a holder length of 10 mm and are engraved with the pinhole diameter.
The pinholes MLB 2.xxx (9 mm mount) have a holder length of 6 mm and a holding groove diameter 7.4 mm in the plane of the pinhole. They are engraved with the pinhole diameter.