1.0mm pinhole aperture mounted in a extra large 1 1/4" or 31.8mm diameter holder. This is the perfect size for large foramt cameras. If you require a different size holder they are available upon request. We have a verity of fixed sizes. 
This pinhole is precision laserdrilled then mounted into an aluminum holder is 0.6mm thick and the pinhole is 0.05mm or only .002 of an inch thick. These pinholes are outstanding and unrivaled quality due to the thinness of the pinhole and the perfect forming of the aperture using the most advanced methods. 
Most people will mount these in a camera body cap, digital or film. You could also build your own camera around this pinhole out of something as simple as a cardboard box.

These are scientific grade apertures and have been utilized by universities and laboratories. The second photo shows the pinhole at 800x under the microscope.

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