Thank you for viewing! I've customized the rubber grip section of a Jetstream 4&1 multi pen with colorful acrylic resin. Acrylic is hard and has a certain stickiness, making it very difficult to work with. I've polished it to a shine using multiple grades of sandpaper and compound. This listing is for the metal grip section and wood parts only. The pen body is not included. On the pen in the image, I've glued the parts so that the desired pattern faces forward. The pattern orientation when attached to your pen will vary depending on the individual pen. No warranty is provided. I will wrap it in bubble wrap and ship it via Nekopos (a Japanese postal service). Shipping will be on weekends due to my schedule, so it will take a little time. If you understand that this is a handmade item and are interested, how about it? Shipping is included. Thank you for viewing! As a stationery enthusiast, I love Jetstream and Dr. Grip 4&1 pens. I dislike the deterioration of the rubber grips, so I started making my own using scrap wood from fine lumber 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. If you like handmade wooden pen shafts, or if you like the works of wooden pen workshops such as Craft A, Nohara Kougei, Koubou Kusabi, Kobuta Koubou, or if you like multi-function pens such as Jetstream 4&1, Dr. Grip 4&1, and Pure Malt Premium 2&1, how about it? I create them using fine wood such as Karin Burl, Karin Red and White, Snakewood, Pink Ivory, Desert Ironwood, Black Persimmon, Black Persimmon Peacock Grain, Red Sandalwood, Ebony, Rosewood, Sandalwood, Palo Santo, Briar, Rosewood, Satine, and acrylic resin. #jnsm