Section 05 MINERAL PRODUCTS 26 Ores, slag and ash 26 20 Slag, ash and residues (other than from the manufacture of iron or steel) contai 26 20 11 26 20 11 00 Commodity Code Description 26 20 11 00 00 -- Hard zinc spelter 26 20 19 00 00 -- Other 26 20 21 00 00 -- Leaded gasoline sludges and leaded anti-knock compound sludges 26 20 29 00 00 -- Other 26 20 30 00 00 - Containing mainly copper 26 20 40 00 00 - Containing mainly aluminium 26 20 60 00 00 - Containing aesenic, mercury, thalium or their mixtures, of a kind used for the extract 26 20 91 00 00 -- Containing antimony, beryllium, cadmium,chromium or their mixtures 26 20 99 00 00 -- Other