This is a spacer specifically for silicone chalk cases. The material is ebony. A small piece of leather is included to be placed between the case and the chalk to prevent small pieces of chalk from falling out. This is completely handmade by an amateur. Therefore, right angles, levelness, size, and thickness are not perfectly consistent. As the quantity is dwindling, this item will be discontinued after 3-4 more sales. If you want one, please order soon. *There is a slightly smaller version available. (If you are concerned about the size, please confirm via comments, etc.) *If the chalk becomes small and a thick spacer is used, the friction with the silicone case will decrease, and the chalk may fall out more easily. Since this item is used in a place that gets dirty, it has been coated with water-based urethane varnish on each side more than 5 times. Please refrain from purchasing if you are looking for perfection or are overly concerned with detail. Please purchase only if you are satisfied. *Want two? If you want two, please let me know in the comments. The second one will be an additional 1100 yen, for a total of 2400 yen. I only have a few in stock, but I have purpleheart spacers, so I can offer a purpleheart spacer for the second one.