It is cast in lead-free pewter, and sits on a plastic base. The flocking detail on my sample piece here even shows the scorched earth of its passage.
Since the dawn of role-playing time, this excellent second-level spell has been represented on the battlefield by a red, orange or yellow 20-sided die. Well no longer. I have crafted this excellent little rolling fireball. It sits on a 1-inch base, and is perfect for use with 25mm role-playing figures on the standard 1 square=5 feet battlemap.
(I used to offer these painted and flocked, but these days I’m just a little too short on time for that. Maybe someday I can afford to hire people to do that for me and I can bring those options back!)