19 Long Beach Lump nuts (otherwise known as LBL nuts), manufactured by Aimcor Carbon Corporation at Long Beach, California, the United States of America, which—
(a)comprise petroleum coke (as to approximately 85 to 100 per cent of the total weight), limestone (as to approximately 0 to 10 per cent of the total weight) and coal tar pitch (as to the remaining weight);
(b)were manufactured from those constituents by a process involving heat treatment and steam injection;
(c)are unmarked random shapes; and
(d)have a sulphur content not exceeding 2 per cent of the total weight.