4 Coal; coal derivatives in this class being coke, coal gas, coal tar oil and fuels; ultra low volatile pulverised coal for injection; low volatile pulverised injection coal; metallurgical coal; thermal coal; coking coal; coal based fuels; coal and coal-related products in this class being coal briquettes, coal naphtha, coal dust and coal tar oil; coal dust (fuel); fuel; low ash content coal; low sulfur coal; mineral coal; coal naphtha.