Girls Butterfly Essential Oil Diffuser Necklace- 16" Stainless Steel- Lava Stone This adorable diffuser necklace features a smaller butterfly pendant and 16" 316L Stainless Steel chain- great for kids or women who want a shorter necklace. This cage pendant opens from the back to allow changing of the lava beads and is securely closed by the chain when being worn- chain secured close is more durable than click to close lockets- the close mechanism will not wear out! This is a great option for those who like to use their oils at school! The stainless steel chain is rust, tarnish, lead, and nickel free- hypoallergenic too! Length: 16"" Diffuser pendant size: 1"" x 0.75"" Pendant Closure: Chain secured Chain Material: 316L Surgical grade Stainless Steel Pendant Material: Rhodium Included in the package: Necklace and three 6mm lava stones (assorted colors)