Charcoal Our charcoal will meet the following specifications QUALITY /SPECIFICATIONS: Carbon content: 75% upwards Ash: 3% Heat: 6500 cal/kg non-sparkling, Volatility:13%, Burning life: 2-5hrs No giant lumps, no dust, free of extraneous matter and incomplete burnt wood pieces. TREES: Based on the specification Sizes: BBQ CHARCOAL 20-70 mm or buyer requirement HUMIDITY: 7.5% Max.