All chains are 18k Gold filled and are marked, it's excellent quality Jewelry. ITEM DETAILS: * Material: 18k Gold Filled Chain Nickel Free Hypoallergenic * Size: 16"/18" Length * If you want to buy the set, the measurements are: - Bismark Chain 3mm16 " - Box Chain 1.5 mm 18" + Moon Chain * Shipment: Free shipping. Everything Is made to order. Order preparation may tak 3 To 5 business day. * Packaging: The jewels are packed and delivered in a beautiful packaging, ideal to give and surprise on special dates such as birthdays, graduations, Valentine's Day, Mother's Day, Women's Day, marriage, Christmas In addition to this, the Packaging bag in which the jewel arrives, will allow it to be kept separately for a longer duration. * Tips: The duration of your jewelry will depend on the care you have with them. Gold filled differs from others, because it lasts longer. Some tips that can help you are: 1. To avoid contact with chemicals such as perfume, put on your perfume or lotion before wearing the jewelry. 2. Store your jewelry separately. 3. Avoid using them in salt water. If you decide to use them, immediately after you get out of the water they should be dried. 4. To get more shine on clothes, you can wash them with a liquid dermatological soap such as Cetaphil. If you have any questions, feel free to message me. Thank you for visiting Mistik Jewelry "A universe designed to dream" Meet me at : * Instagram: mistik.jewelry This way you will be up to date with all the new references and discounts. * Web: mistikjewelry.com Thank you for supporting me in this dream called "Mistik" I am sure you will not regret being part of our family.