I've customized the rubber grip section of a Jetstream 4&1 multi pen with maple burl wood. It has a combined finish of glass coating and beeswax wax. This listing is for the metal grip section and the wooden parts only. The pen body is not included. No warranty is provided. It will be wrapped in bubble wrap and shipped via Nekopos (a Japanese postal service). Shipping will be on weekends due to my schedule, so please allow some time. For those who understand handmade items, and with shipping included, how about it? About Maple Burl: It features a silky luster and a fantastic pattern that changes depending on the viewing angle. It has a luxurious feel and is considered to have high decorative value. 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 scrap wood from high-quality timber I had collected. You can customize these practical pens to your liking, just like changing your smartphone case. I hope that my wooden pen shafts and wood parts can be of some help in your daily work, studies, tests, certification exams, and entrance exams. For those who like handmade wooden pen shafts, those who like the works of wooden pen shaft workshops such as Craft A, Nohara Kougei, Koubou Kusabi, 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 figured wood such as Karin Burl, Karin Red and White, Snake Wood, Pink Ivory, Desert Ironwood, Black Persimmon, Black Persimmon Peacock Burl, Red Sandalwood, Ebony, Rosewood, Sandalwood, Palo Santo, Briar, and Rosewood. #jnsm