1 Aimcor Excel briquettes, manufactured by Applied Industrial Materials UK Limited at Newfield, County Durham, which—
(a)comprise petroleum coke (as to 60 to 75 per cent of the total weight), low volatile coal and reactive coke (as to 20 to 25 per cent of the total weight) and cold-setting resin binder (as to the remaining weight);
(b)were manufactured from those constituents by a process involving roll-pressing;
(c)are unmarked pillow-shaped briquettes and have an average weight of 73 grammes; and
(d)have a sulphur content not exceeding 2 per cent of the total weight.