These Exotica brand silver Japanese style charcoals are all natural, chemical free charcoals that are used to light shisha in a hookah. When smoked they produce no taste and no odor. Best of all, because of their square design, they will not roll off of your bowl like old fashioned natural charcoal. Their burn time averages 1 hour, they are scored to easily break into squares, and they include 96 pieces.