An Ateco plastic rolling pin (19175). Official current name is 20" Plastic Rolling Pin; the store title still says 19.5". Official page: dense food-grade plastic, machined to a smooth, flat non-stick finish, for rolled fondant and gum paste. Usable length 18.75". Ateco's catalog also lists diameter 1.75" and polypropylene. Made in China. Specs from Ateco's 20" Plastic Rolling Pin page and the catalog listing.
The fondant pin. Dense plastic, 18.75 inches of usable barrel.