Dear Sir/Madam, I'm selling the following product with specifications below: 1. Purity 100% hardwood 2. Non-chemical substance 3. Sizes 20mm to 80mm (no dust) 4. 100% organic charcoal 5. Not contain smoke 6. 4hrs minimum burning period 7. Calorific value 7760 kcal/kg minimum 8. Moisture: 7 TO 9% 9. Show More