Below is a specification for our Quality HARDWOOD charcoal Heating Value 6800Kcal-7200Kcal/Kg - Ash Content 5% ( Max. on Dry Basis ) - Fixed Carbon 74% - 78% - Volatile Matter 19% - 23% - Moisture 3% - 5% - Sulfur 0.2% ( Max. on Dry Basis ) - CaO 32% ~ 35% - Al2O3 1.85% ~ 1.90% - TiO2 0.22% ~ 0.25% - P2O5 1.300% - Fe2O3 5.60% - SiO2 38.50% ~ 39.50% - Average Weight 26g/unit - -150mm 3.4% - +150mm 96.6% - WHOLEROUND4% - CHUNK BROKEN + SPLIT BROKEN 20% - LUMP CUTS 76% - Cross Section1.5cm ~ 11cm - Length1.5cm ~ 11cm