Specifications of Coconut Shell Charcoal: Grade 1: - Size: 4.5 * 4.5 cm, core = 1cm - Moitsure: 8% max - Ash: 6% max - Q: 6700-6800 (kcal/kg) - Iodine < 1000 Grade 2: - Size: 4.5 * 4.5 cm, core = 1cm - Moisture: 8% max - Ash: 8% max - Q: 6000 (kcal/kg) - Iodine < 1000 Grade 3: - Size: 4.5 * 4.5 cm, core = 1cm - Moisture: 8% max - Ash: 18% max - Q: 5500 - 5600 (kcal/kg) - Iodine < 1000 Granular nature: - Moisture: 3-5% - Ash content: 2-3% - Volatile: 20-28% - Fixed Carbon: 70-75% - Calorific value: 7500-8000 kcal/kg