--- Cats give us attention, relieve our loneliness, provide comfort, fun, and play, affection, and special unique permission to stroke/ pet them and keep them on our laps, which we know releases oxytocin, which in turn suppresses the production of cortisol, a stress hormone --- DETAILS: Base Metal with Worn Gold Plating Enamel Material Post Back Closure 2.25" Length x 1" Width Made of zinc and are completely nickel-free