This is the Kalita "Mini Mill." It's a hand-crank coffee mill, and you can adjust the grind size with the dial. I've used it a few times and then stored it. According to the Kalita website, it's not washable, so I cleaned it with dry tools, but I couldn't completely remove the stains inside. This doesn't affect its operation. [Additional Note] I checked the inside again. What I thought were stains might be the wood grain pattern. Please check the 6th photo. Please refrain from purchasing if you are concerned. Materials: Wood, Steel Size: Max width 18cm, Max height 18cm (including handle) Accessories: Part of the original box (the grind adjustment instructions) Thank you for looking.