Coin is bronze that has been treated with a coat of clear acrylic that makes it water resistant and maintain it’s color. 18 inch twisted helix chain is stainless steel which will not tarnish or fade. Can be made longer or shorter upon request. Longest request at current price is 20 inches. Halloween Costume Cosplay Tattoo Earring Necklace Bracelet Fashion Chain Pendant Jeans Women Boys Girls Minimalist Boho Punk Goth Retro Tattoo Handmade Hoops Drops Dangles Crystal Cubic Zirconia Zircon Gold Silver Hand Crafted Costume Jewelry Fashion Jewelry Fashion Jewelry Accessories Costume Jewelry Men Cosplay