I have customized a multi-function pen, the Pure Malt Premium 3&1, with a Karelian burl (Amboyna burl) wood body. It has four functions (black, red, blue BP + 0.5mm SP) and a shaker mechanism. The ballpoint pens use the 4C standard, and Jetstream refills are compatible. Multi-function pens with wooden bodies are rare. With four functions in one pen, why not add 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 Karelian Burl Karelian burl is a burl (knot) material that can only be harvested from a part of the root of the Karelian tree, and it has been popular as a material for high-end crafts since ancient times. Its grain is very beautiful, and the various patterns created by the complexly intersecting wood grain can truly be called a natural beauty. In particular, the areas where dark and light colors are mixed are called "Kohaku" (red and white) and are very valuable. Currently, imports have stopped, and it is becoming increasingly difficult to obtain. Thank you for looking. 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 scrap wood from famous trees that I had collected before. You can customize these practical pens to your liking, just like changing your smartphone cover. I hope that my handmade wooden pens and wood parts can be of some help in your daily work, study, tests, qualifications, and entrance exams. For those who like handmade wooden pens, those who like the works of wooden pen workshops such as Craft A, Nohara Kougei, Koubou Kusabi, and Kobuta Koubou, 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 use Karelian burl, Karelian Kohaku, snakewood, pink ivory, desert ironwood, persimmon, persimmon peacock grain, red sandalwood, ebony, rosewood, sandalwood, palo santo, briar, rosewood, and satine to create them. #jnsm