2 HIGH PURITY GRAPHITE CONTAINERS, PARTICULARLY THOSE FOR USE FOR OR IN CONJUNCTION WITH APPARATUS FOR MELTING, CASTING, OR REFINING MATERIALS SUCH AS METALS, CERAMICS, AND CHEMICALS AND INCLUDING BOATS, FUNNELS, CRUCIBLES, AND MOLDS AND PARTS THEREOF INCLUSIVE OF BLOCK INSERTS, AND THOSE FOR USE IN THE TRANSPORT OF RADIO-ACTIVE MATERIALS