Carbon based, conductive double sided adhesive tabs for microanalysis, 12mm also known as Leit tabs.
They can be pressed onto a specimen stub and leave a conductive carbon adhesive when the backing material is removed.
When a firearm is shot, in addition to the projectile(s), a mass of debris comes out the muzzle. These gunshot residues (GSR) can include various primer residues, residues from projectiles, and partially burned and unburned gun powered particles. The examination and analysis of GSR on items of evidence can allow determinations to be made as to weather a hole or defect is consistent with being caused by a bullet (or other firearm-related projectiles)