The high quality charcoal for hookah are made of highly coconut charcoal. They are pure nature and no any toxicity. The products are no smoke, no smell, no spark, non-toxic, easy to light, long burning time, economic and environmentally. Specification Large size : 40x30x25 mm Medium size : 25x25x25 mm Small size : 25x25x15 mm Shape : cubic Calory (J) : 6400 - 8000 Moisture : 5% max Ash : 3 - 5% Hardness : 90% min Burning time : 2.5 - 3 hours Fixed carbon : 70% min Bulk density : about 0.25g/ml pH : 7 Packing : 36 - 72 pcs/box or 30 - 120 pcs/ box 1kg - 2kg in plastic bag, box. 5 - 10kg in carton box. or as buyer's request