comprise anthracite fines (as to approximately 30 to 55% of the total weight), biomass (as to approximately 25 to 35% of the total weight), petroleum coke (as to approximately 10 to 40% of the total weight), bituminous coal (as to approximately 0 to 5% of the total weight), and natural organic binder (as to the remaining weight);

were manufactured from those constituents by a process involving roll pressing, followed by heat treatment at a temperature of approximately 300°C in a controlled, reduced oxygen environment;

are hexagonal-shaped briquettes with a single stripe on one side across the flats;

have an average weight of 135g per briquette; and

have a sulphur content not exceeding 2% of the total weight.