Specification: - Ash: 1.5-2.5% - Carbon: 80-98% - Gross calorific value: 7500-8500 kcal/kg - Burning time: 3 - 4 hours for wood charcoal - Burning time: 5 hours for sawdust charcoal AA Grade - Burning time: 3 - 4 hours for sawdust charcoal AB Grade - Size: Diameter: 1.5 - 2cm, 2 - 3cm, 3 - 4cm, 4 - 6cm, 6-8 cm Length: 20 - 25cm; 10 - 20cm, 4 - 10cm - Packing: 10-15 - 20 kg in PP bag or in carton