This is a keyaki burl (knot) used in the construction of the South Town Magistrate's Office since the Edo period. Can be changed to a ballpoint pen. If using ballpoint pen hardware, the weight will increase by approximately 5g. Please contact us in the comments if you wish to do so. ↓Ballpoint Pen Details↓ Refill: Schmidt P-900F Standard: G2 Wood Type: Keyaki (Japanese Zelkova) Hardware: KATO202 (supervised by Kobo Kusabi) Width (Max): Approximately 14.1mm Total Length: Approximately 136.8mm Weight: Approximately 25g Finish: Kinuka Oil ☀︎Details ・The shape is designed to be most expanded slightly towards the nib for easy grip. ・The surface is sanded with grits ranging from coarse to 600. This creates a moderate luster, allowing you to enjoy the natural texture and scent of the wood. ・The surface is cut repeatedly while checking to ensure there are no irregularities. ・The finish uses Kinuka oil. The main ingredient is derived from rice, is tasteless and odorless, and is gentle on the skin. ・By alternating sanding vertically and horizontally, the sanding marks are made less noticeable. ★Keyaki (Burl) Deciduous tree of the Zelkova genus (Ulmaceae family) Considered the best wood among broadleaf trees. It has a powerful grain pattern and a lustrous beauty. It has been used since ancient times as the main pillar of houses, as well as for the construction materials of palaces and shrines, and for high-end furniture. Burl (Knot, Burr) Rare because it can only be obtained from limited parts of the tree, such as the trunk and roots. The causes of burl formation include damage to the tree from insect entry, injury, disease, typhoons, etc., which cause abnormal cell proliferation during the repair process, as well as genetic factors. Various patterns appear, such as swirls, ripples, and eye-like grains.