Vintaj Vogue nickel-free brass . fv340 The necklace above includes the Vintaj Natural Brass Full Diamond Circle Filigree, Vintaj Vogue Butterfly Filigree Assortment (or Peony Filigree and Butterfly) Vintaj Natural Brass Etched Cable Chain, Nunn Design Small Textured Cable Chain and Vintaj Natural Brass Standard Hook. The chain links open and close, so they were linked to each other. The jump rings included wiht the Butterfly Filigree Assortment open and close into the holes of the filigrees to hang the components.