Pendant Necklace Details Design is printed on an aluminum insert. Once the aluminum disc is placed into the pendant, we then coat over it with a strong, UV epoxy coating and let harden. This leaves a clear, glass like dome over the top that is both permanent and scratch resistant. This is not a printed paper insert! Pendant inner diameter is 25mm Comes with a 22 inch matching snake style stainless steel chain. Other chain sizes may be available just contact me.