Moisture - < 3% Burning time - > 2.5 Hours Heat Value (Calory) - > 7500J/kg Fixed carbon - 80%~95% Ash - < 2% Color - Black Packed in carton boxes 25x25x8 cm, avg. 2.7 kg per box. Any other packing on request. Charcoal for hookah(Shisha) 1) Our hookah briquette is manufactured from high-quality grade â??Aâ?? birch coal. 2) During burning our product emits natural fine aroma that will be to the liking of true connoisseurs. 3) Due to special manufacturing technology our briquette burns longer and hotter than equivalents from other manufacturers. 4) When used our coal does not become loose and leaves minimum ash afterwards. 5) Environmentally friendly product that does not harm the environment. 6) We guarantee a stable quality of our product.