This Threadless Top is made from Ti-6Al-4V ELI titanium alloy and finished with a nickel-free CoCr PVD coating. This coating gives the titanium a bright, warm tone that closely matches white gold, allowing the top to blend seamlessly with solid white-gold jewelry.The top is used in combination with a matching Threadless Base. With the threadless system, the top is pushed into the hollow post, where it is gently tension-fit and held securely in place. There is no threading and no click mechanism, making changes easy and comfortable.All threadless tops in our collection fit all compatible threadless bases, regardless of the size of the post. Choose your top purely by style: a smooth ball, a ball with cubic zirconia, or a clean flat disc.Specifications:threadless topTi-6Al-4V ELI titanium alloynickel-free CoCr PVD coatingthreadless tension-fit systemavailable as ball, cubic zirconia ball or flat discThe top is sold separately and combined with a separate threadless base.