72. Supabrite Coke Doubles, manufactured by H J Banks and Company Limited at Inkerman Road Depot, Tow Law, County Durham, which—
(a)comprise metallurgical coke (as to approximately 40 to 60% of the total weight) and petroleum coke (as to the remaining weight);
(b)were manufactured from those constituents by a process involving blending and screening;
(c)are unmarked random shapes; and
(d)have a sulphur content not exceeding 1.95% of the total weight.