Let your kidney keep your keys together. The engraved back of the keychain and cardboard display both say: "Kidney: When Urine Love." Back of the packaging includes info about these renal powerhouses so you can learn a little something and keep your keys organized. Zinc alloy with soft enamel, polybagged. Kidney part of keychain measures 2" x 1.5". Designed in the US, made in China.