Unless otherwise noted in the individual item description, all of my earring wires and posts are hypoallergenic, lead-free surgical steel. While surgical steel does contain nickel, the nickel is so tightly bound within the metal that it rarely triggers allergic reactions, unlike many other base metal findings and even sterling silver, which is sometimes alloyed with nickel. I have extreme nickel sensitivities, and surgical steel is one of the few metals that I can safely wear for extended periods of time, which is why I have chosen to use it in my pieces. My necklace and bracelet chains are nickel-free, silver plated brass, unless otherwise noted. If you'd like to substitute out a different metal, just contact me and I'll be happy to accommodate you. I also offer 14kt gold, titanium and sterling silver findings. They are usually located in the listing as an option. If you do not see it as an option, please contact me before you purchase.