Moon Ball Back Stud in Gold

18k gold plated stainless steel Ball back- screw on closure Completely waterproof Hypoallergenic and nickel free Suitable for new piercings also! 5 mm in size Ball back studs are everything, and this one is no different. This is a great option for those who like to wear their jewelry for months at a time because it won't poke the back of your head and you won't even know they are in! Plus the tiny moon is so pretty!