Discontinued OHTO Ballpoint Pen, Enamel? Rare, Defective, Reasonable Condition It feels like it's made of enamel, but it might be baked enamel or a ceramic body. The material is unusual and feels nice, but perhaps because of that, there is a crack in the body (see the last image). Also, the ink cartridge is a special type, and the ink didn't come out, so I modified it myself. I cut part of the original cartridge and connected a D1 refill to it with cellophane tape (see the 8th image). If you comment, I will include one D1 refill. - Mechanism: Twist type - Refills are not guaranteed. If you have any questions or requests, please feel free to ask. #Other_ballpoint_pen #ballpoint_pen_OHTO