Thank you for viewing! I have customized the rubber grip of a Jetstream 4&1 multi pen with a black water buffalo horn, a material often used for name stamps. Enjoy the unique feel of the polished, non-slip surface that adheres to your fingers. This listing is for the metal tip and wood parts only. The pen body is not included. No warranty is provided. The item will be wrapped in bubble wrap and shipped via Nekopos. Shipping will be on weekends due to my schedule, so please allow some time. If you understand this is a handmade item and are interested, this includes shipping. About Black Water Buffalo Horn: This is the highest grade of black water buffalo horn, generally referred to as "dye-free," used for name stamps. It's a high-quality part that doesn't require dyeing, and its luxurious black luster is attractive. Black water buffalo horn is mainly composed of protein and is susceptible to drying. When storing, keep it in a case and occasionally wipe it with paper soaked in oil to prolong its life. 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 the famous trees I used to collect. You can customize these practical pens to your liking, just like changing your smartphone case. I hope that my handmade wooden pen and wood parts can be of some help in your daily work, studies, tests, certification exams, and entrance exams. If you like handmade wooden pens, works from wood pen workshops such as Craft A, Nohara Kougei, Koubou Setsuri, Kobuta Koubou, etc., or multi-function pens like Jetstream 4&1, Dr. Grip 4&1, and Pure Malt Premium 2&1, please consider this. I use famous wood such as Karin瘤 (Karin burl), Karin紅白 (Karin red and white), Snake Wood, Pink Ivory, Desert Ironwood, Black Persimmon, Black Persimmon Peacock Burl, Red Sandalwood, Ebony, Rosewood, Sandalwood, Palo Santo, Briar, Rosewood, Satine, and acrylic resin. #jnsm