A best-selling product from Mitsubishi Pencil: The Jetstream ballpoint pen. This is the front shaft for the pen. It has been changed from the standard rubber specification to a wood specification. It offers easy handling that fits comfortably in your hand, creating a one-of-a-kind custom ballpoint pen that sets you apart. The wood specification uses precious Karin Kobu (Karin burl). Karin Kobu is a burl (wart-like growth) harvested from only a part of the root of the Karin tree, and has long been a popular wood species for high-end crafts. Its grain is extremely beautiful, and the various patterns created by the complexly intersecting wood grain can truly be called the beauty of natural design. Currently, imports have stopped, making it a very rare and difficult-to-obtain wood species. The dimensions of the Karin Kobu are almost the same as the genuine rubber. This is only the front shaft; the ballpoint pen body is not included. If you would like the ballpoint pen body included, please comment. Also, if you would like other wood species, please comment. Price negotiations are not accepted. I have also listed various other items. Please take a look if you like. #KoboMatch Thank you. #Jetstream #Jetstream4&1 #JETSTREAM4&1 #Multi-function pen #Multi-function ballpoint pen #Wood grip #Wood shaft custom #Assembled front shaft #Mitsubishi Pencil #KoboMatch