September 20: This article has been updated to include a statement by both of the mentioned firms.

A Chinese firm has been marketing potentially dual-use graphite materials to buyers in North Korea, recent photos seen by NK Pro shows.

The items – which included graphite electrodes, rods, blocks, plates, tubes and molds – were being marketed at a recent trade fair for use in “ultra-high power electric arc furnaces,” among other applications.

Graphite can be used in high-temperature furnaces and in smelting processes, with the tip of a graphite electrode capable of reaching temperatures as high