Flip Flower Silver Essential Oil Diffuser Necklace- 18". Want your aromatherapy necklace to be reversible? This one is! Each side features a different flower design. This necklace is on a lightweight 18"" link chain, making it very comfortable to wear. Lead and nickel free, the rhodium plating is very resistant to oils and will last for a long time. Length: 18". Diffuser Pendant size: 0.875 x 0.75". Pendant closure: Chain Secured. Chain and Pendant Material: Rhodium. Included in package: Necklace and three 6mm diffuser lava stones (assorted colors).