Material: Stainless steel.Size: Outer diameter 34mm, Inner diameter 19mm,Thickness: 13mm? notification 1. Display different graphics on different displays, The picture is for reference only, and the actual product should occupy the upper hand. 2. The size of the product is manually measured. There are certain errors, please understand. 3. If you have any questions about this product, please contact us, we will answer it for you. 4. If you buy the product, we will transport you as soon as possible. 5. The product is processed, and there is a slight processing mark on the surface. If you mind, please don’t order