I made the grip of the multi-function pen "Jetstream 4&1" out of wood. The material is Grenadilla. It's a wood also used for musical instruments like clarinets. It has a fine, black grain and a smooth luster. It was finished with several rounds of sanding and beeswax. The size and shape are almost the same as the original rubber grip. This listing is for the grip (front section) only. The pen body is not included.