charcoal briquette 1. Charcoal 100% coconut shell, about 6,000 calories of heat, lasts about 3 and a half hours. 2. Charcoal Shell 80 Dust 20 about 5,000 calories, lasts about 3 hours. 3. Charcoal B Shell 50 Dust 50, heat 5,000 calories, last for 2.30 hours. 10 Kg / Carton 1500 Carton/ 20 ft Container Lead time 15-20 day