Stainless Steel jewelry does not tarnish and oxidize, which can last longer than other jewelries. It is able to endure a lot of wear and tear. And it is amazingly hypoallergenic. Such advantages make it a more popular accessory.*Material : 316L Stainlesss Steel *Holds Small Amount of Dried Flowers,Dirt,Hair, Perfume, Cremains or Any Treasured Memento. *The Volume of the Inside Space is 0.05ml, About a Drop of Water.High quality stainless steel has high resistance to rust, corrosion and tarnishing, which requires minimal maintenance. Stainless steel is one of the most bio-compatible metals, so stainless steel jewelry is amazingly hypoallergenic because of its anti-allergic properties. As one of the strongest of all jewelry metals, it does not oxidize and will be very durable. All makes it a top fashion accessory to complement your wardrobe with the sleek, contemporary styling offered by our stainless steel jewelry.