Zambookah bamboo charcoal is all natural and designed specifically for use with hookahs. With a five centimeter diameter hole in the center, zambookah is ideal for your sahara vortex bowl. It burns cleanly and consistently without any harsh chemicals, and best of all, each coal lasts three times longer than other shisha coals with very little ash. It is recommended to light only 3/4 of the coal, do not light the coal fully. This will keep the coal lasting longer during your hookah session. box: 10 rolls roll: 10 tablets tablet size: width: 2 inches inner hole: 0.75 inch height: 0.5 inch