This bracelet features charms for chemists: three different molecules (acetylcholine, dopamine and serotonin), an Erlenmeyer flask, a microscope and a disc laser engraved with Chemist and the Bohr-Rutherford model of the atom. All charms except for the disc are zinc alloy, The disc is stainless steel. Seven inch rhodium plated brass chain can be upgraded to stainless steel for an additional fee.