This is a wooden-bodied mechanical pencil, MSD1 model, from Kobuta Kobo. The lead size is 0.5mm, and the wood type is lacewood. I purchased this on this site before, but it didn't suit me, so I'm putting it up for sale. I used it for one day and then stored it in a pen case that protects each pen individually. Lacewood is a rare wood from Australia with restricted logging, and it's characterized by its vein-like grain. This pen has a removable clip, so those who want to write more comfortably should give it a try. It's a slim pen with a good view of the pen tip, and I think it's a pen that can be used in various situations. The pen tray is not included.