Indonesian Premium Coconut Charcoal Briquettes We are proud producers of 100% natural food-grade charcoal briquettes, with a focus on quality, impeccable service and speed. Unimax Charcoal Briquette is the leading supplier of coconut products from Indonesia, who focus on providing Indonesiaâs high quality agricultural products & technology. Our factory is located in Central Java, Indonesia. SPECIFICATION Raw materials: 100% Coconut Charcoal Burning time: 2-3 hours Calories: 7000 â 7200 Moisture Content: 7% Ash Content: 2-2.5 % Fixed Carbon: 84% White Ash Does not Leave Marks on Hands