7. Bord na Móna Firelogs, manufactured by Bord na Móna Fuels Limited, Newbridge, County Kildare, Republic of Ireland, which—
(a)comprise slack wax (as to approximately 55 per cent of the total weight) and hardwood sawdust (as to approximately 45 per cent of the total weight);
(b)were manufactured from those constituents by a process of heat treatment and extrusion;
(c)are firelogs approximately 255 millimetres in length and 75 millimetres in diameter, with grooves along one longitudinal face;
(d)have an average weight of 1.3 kilogrammes per firelog; and
(e)have a sulphur content not exceeding 0.1 per cent of the total weight.