A little zing for your ears, this little lightning bolt works well on its own or in a stack with others (Idea: moon, star, and lightning bolt!).   This listing is for a single ASTM F136 implant grade titanium push-pin flat back stud.   Measurements: Post measures at 1/4 inch (6mm) length, with a 4mm disc on back. 18 GA (1mm). Refer to listing images to get an idea of the size of the stud on-ear. Check your own ear measurement before ordering. Materials: ASTM F136 titanium, 18k PVD gold plate (for gold color), black zirconia   Colors available: 18K Gold Plated Titanium, Titanium Silver   Care: These are tarnish-proof and waterproof. With all items of this material, if you come into contact with chlorine or salt water, cream, lotion, perfumes, etc. Rinse in water and dry if this does happen.  When not wearing, store in a dry, cool place.   *Please see site return policy for more information regarding flat back studs!