specimen holder for standard 12.5 mm stub holder for scanning electron microscopes

A small specimen holder to clamp a thin specimen. This item allows it to look at the side of a thin specimen in a scanning electron microscope. It is designed to fit on a standard 12.5 mm aluminium stub.
The holder has to be sputtered with a metal like gold or painted with conducting color to avoid chargings!

V1 is prepared for a standard 8 mm M4 screw
V3 is prepared for a standard 8 mm M3 screw (recommended!)

Fusion360 file: https://a360.co/2TehUBP