This is a vintage heavy cardboard container with a rubber top of Dixon brand Jet 4 graphite. It's powder and used to lubricate anything that sticks squeaks, or rubs—also used in art to cover the background to mix with other media. The container is full and in very good condition. The rubber top is in very good condition. No dry "rot." 3/4 oz. 4 3/4" high. The Joseph Dixon Crucible Company, Jersey City, New Jersey.