Burning Time: 5 - 7 hours Moisture: 6-8 % Fixed Carbon: 80% Calorific Value: 6500 to 7000 Kcal/kg Ash Content: 1.5-2 % Volatile Matter: 12.5 to 30% Sizes: 20mm to 100mm, 30mm to 200mm (based on your request) Shape: Briquettes Foreign Matter: 1 % made with physical methods, 100% pure hardwood No Chemical contents ph value :7-9