◆ Thank you for viewing from among many options. ◆ The wooden shaft uses ebony, and the refill is a Japanese-made needle point refill (Auto Co.). The ballpoint diameter is 0.7mm, using oil-based soft ink, which is ideal for writing Japanese. Replacement refills can use Mitsubishi Pencil uni ultra-low friction Jetstream ink SXR-600 series, and JIS G2 standard refills (Parker type). ◆ The internal mechanism of the wooden shaft parts is also solid. The wooden shaft is finished with carnauba wax, so it has a glossy finish and is not sticky. Hardware: Knock-type ballpoint pen Hardware color: Gold Refill: Mitsubishi Pencil uni ultra-low friction Jetstream ink SXR-600 JIS G2 standard refill type Wooden shaft: Ebony Weight: Approximately 25.3g Thickness: Maximum diameter approximately 13mm Total length: Approximately 134mm [Finish] To beautifully finish the natural wood grain, the surface is polished with sandpaper, changing the grit from coarse to fine, until a glossy finish is achieved. After that, friction polish is used for the base treatment, and then carnauba wax (natural material) is applied and polished with friction heat. It has a glossy finish and is not sticky when held. [How to replace the refill] You can unscrew the middle part of the wooden shaft pen. [Caution] Please remove the protective material from the pen tip before use. [Shipping method] ◆ It will be placed in a pen sleeve, then in a plastic bag, wrapped in bubble wrap, and then shipped in a cardboard box. ◆ The color of the photo may differ slightly from the actual product due to the shooting environment. The photos have not been processed in any way. Also, it is unfortunate that the photos cannot fully convey the quality of the actual product. Please understand. ◆ Please understand that there may be some imperfections as it is handmade. ◆ Contact may be delayed due to work. Thank you for your understanding. ◆ Please ask if you have any questions, and I will explain them to the best of my ability. Thank you. Type...Ballpoint pen Ink...Oil-based Body material...Wooden shaft