This is an El Grande pen. I replaced the stock cap finial and body finial with custom parts (reasons: I don't like the material used for the lower barrel finial, and the cap finial is noticably larger than the clip band - makes for an ugly transition from the cap to the finial). The material is jet black acrylic. If anyone is interested, the thread for the lower barrel finial is M10x0,75, as opposed to M10x1 used for the front section.