40mm TBSS Challenge/Flip coins. Coins are laser etched in house and include a protective case as well! Each coin is unique and minor imperfections are present on the surface (light scratches, and swirls). Copper coins can patina at a more rapid rate depending on how much they are handled.
All coins are 40mm in diameter
Cupronickel - 30 grams - Cu 56-59% | Ni 17-19% | Zn 15-17% | Fe .3% | Pb 0.03%
Copper - 28 grams - Cu 99.96% | Pb 0.004% | Sn 0.002% | Ni 0.002% | Fe 0.004%
Brass (C2800) - 24 grams - Cu 61.35% | Zn 38.5% | Pb 0.0045% | P 0.003% | Fe 0.006%