This is a mechanical pencil made from Jinda Keyaki wood. The lead diameter is 0.3mm, but it's compatible with Pentel Stein leads, so you can use 0.5mm leads by purchasing them commercially. It's been sitting unused in my desk, so I'm putting it up for sale to someone who will use it. The pen is made with extreme care, and there is no step between the wooden shaft and the metal parts. The pen itself has a low center of gravity and is easy to handle, making writing enjoyable. The thickness is slightly thicker than Nohara Kogei and thinner than Kobo Kusu. The eraser is unused. I'm sorry, but I'm not considering lowering the price. Thank you. Type: Drafting mechanical pencil Body material: Wooden shaft