ZMJ Map Unique World Necklace Choker Fashion Jewelry for Women(J-SN254) Material: Alloy Tips to Maintain your accessories: 1) Avoid direct contact with heat, or expose under the sun. 2) Before showering, take out the accessories and keep it in a safe place. 3) Avoid solvents or chemicals like perfume or soap. Dry it with a clean towel if gets wet. 4) Clean in a secure location, not the rim of a sink where a piece may slip down the drain. 5) Use only a soft brush, never sharp or hard objects, to remove dirt or particles. Items will ship to you within 24 hours,and will be arrive you about 5-15 days.