45. ZIP Firelogs, manufactured by Allspan B.V., Macroweg 4, 5804 CL Venray, The Netherlands, which—
(a)comprise slack wax (as to approximately 58 to 59 per cent of the total weight) and hardwood sawdust (as to the remaining weight);
(b)were manufactured from those constituents by a process of heat treatment and extrusion;
(c)are firelogs approximately 265 millimetres in length and 80 millimetres in depth, with grooves along the faces and have an average weight of 1.3 kilogrammes; and
(d)have a sulphur content not exceeding 0.1 per cent of the total weight.