I am distributor of of coconut charcoal briquettes in Thailand. Below is our product contents:Moisture content: 8% max Volatile Material: 20.1% max. Extremely low volatile Ash content: Only 2.3% of the original weight. Burning time: 3+ hoursFixed carbon: 69.6% Hexagonal type Heat value: 6,720 Kcal/KgToxic heavy metal material: Not detected Material: 100% coconut shell For more inquiry pls do not hesitate to contact me via casanada at gmail dot com.