Charcoal Briquettes Made using mangrove charcoal powder as the main ingredient. High quality Charcoal for Barbecue and heating. We provide any needed quantity with customized packaging as per customer 's request. Our Charcoal has the below specifications : Percentage of net Carbon up to 80%. Combustion period up to 4:6 hours. Calorific value up to 20 Gigajoule/tone. Percentage of humidity does not exceed 1%. Percentage of Volatile compounds from 11.5:15 %. Percentage of ash does not exceed 10%.