Description: surplus from R&D laser university department. They are used, but great overall. SPECS: 150 micron (0,15mm) on a SS magnetic plate (Ø 23.18mm, thickness 1.1mm). Magnetic means it can be magnetized under magnetic forces. Great for tests or DIY pinhole projects.
Condition: nice. Remember I have many of these (most are good). Please, see pictures as these tell you exactly what to expect. Close-ups are taken through Wild 450 Epi high resolution loupe.