The DW smartwatch case is one of the most meticulously developed products in the DW lineup. The material is stainless steel, and the color is black, with a size of 40mm. It's very easy to attach the case and the synthetic rubber (FKM) watch strap to your smartwatch. The Apple Watch case is compatible with Apple Watch Series 6, 5, 4, and Apple Watch SE. Enjoy the functionality of your Apple Watch in your own style. Thank you for viewing. I purchased this two years ago from ZOZOTOWN, but I'm selling it because I no longer use it. Apple Watch