Briquette Charcoal is made by Rubber wood Charcoal. Our modern process produces strong and high density charcoal.The round hole that runs through the middle ensures air inflow for efficient burning. our charcoal is completely natural. This Grade is basic grade. Raw material Rubber wood Charcoal Shape hexagonal fixed carbon >44% calory >5240 cal/g burning time 2-4hours Diameter*length 4.5cm*10cm package 20KG PP bag If you want the best grade, we can make it. (example, made from coconut shell, mangrove wood) 15 Ton/Tons (Min. Order)