Top Quality 316L Stainless Steel - Black and Silver Color Lightning Style Ring - Width is approximately 7mm (two piece section ring style). 316L is the highest grade of stainless steel used in the jewelry market. It is so good at resisting fade, rust, and corrosion, that it is used in architecture as well as in marine environments. At the same time, it is safe to use for medical purposes inside the body. It will not fade, change color, or leave stains on your body. It doesn't even require any maintenance to keep it looking new. Shopping Tip: To order similar style rings in different sizes, select the desired ring size and then click "add to cart." Choose another size and click "add to cart" again.