Threadless end fits in any 16/18g threadless post which can be purchased online or at your local piercer. Piece has been worn but is like new. See website below for more info and clear pictures. https://www.buddhajewelry.com/products/3-little-pears-london-blue-topaz-threadless-end?_pos=4&_sid=bb9f305e3&_ss=r