Customized the wood parts of the multi-function pen "Pure Malt Premium 3&1" with black water buffalo horn, a material used for seals. Enjoy the unique feel of the pen, which is shiny yet non-slip and adheres to your fingers. It's a 4-function (black, red, blue BP + 0.5mm SP) pendulum type. The ballpoint pens use the 4C standard, and Jetstream refills can be used. The included refills are not Jetstream, so please purchase them separately. There are few multi-function pendulum pens with wooden shafts. With 4 functions in one pen, how about adding one to your pen case? The pen is new. I am not considering discounts. There is no warranty. For those who understand handmade items, how about it, including shipping? The product will be shipped in a box via Takkyubin Compact. Shipping will be on weekends due to my schedule, so it will take a little time. About Black Water Buffalo Horn: I used the highest grade of black water buffalo horn, which is also used for seals, generally called "dye-free." It is a high-quality part that does not need to be dyed like other black water buffalo horns, and its attractive feature is its luxurious black luster. Black water buffalo horn's main component is protein, and it is characterized by being vulnerable to dryness. When storing, you can keep it for a long time by putting it in a case and occasionally wiping it with paper soaked in oil. Thank you for viewing. I love stationery and use Jetstream and Dr. Grip 4&1 pens. I dislike the deterioration of the rubber, so I started making them for myself using the scraps of fine wood I had collected. You can customize these practical pens to your liking, just like changing your smartphone case. I hope that my handmade wooden shaft pens and wood parts will be of some help in your daily work, study, tests, qualifications, and entrance exams. For those who like handmade wooden shaft pens, those who like the works of wooden shaft workshops such as Craft A, Nohara Kougei, Koubou Setsuri, Kobuta Koubou, etc., and those who like multi-function pens such as Jetstream 4&1, Dr. Grip 4&1, and Pure Malt Premium 2&1, how about it? I make them using fine woods such as Karin瘤 (Karin burl), Karin Kouhaku (Karin red and white), Snake Wood, Pink Ivory, Desert Ironwood, Black Persimmon, Black Persimmon Peacock Grain, Red Sandalwood, Ebony, Rosewood, Sandalwood, Palo Santo, Briar, and Rosewood. #jnsm