This bracelet features charms for chemical engineers: three different molecules (acetylcholine, dopamine and serotonin), an Erlenmeyer flask, a microscope and a disc laser engraved with Engineer and the Bohr-Rutherford model of the atom. All charms except for the disc are zinc alloy, The disc is stainless steel. The charms are on a seven (7) inch stainless steel bracelet.