... ,BBQ Material: The source of material is wide,could be coconut shell, peanut shell, stalk shell,corncob,sawdust and so on ... hulk is the best of all.advantage of machine-made charcoal :high density,low ash content, no smoke ,no smell, no ... pollution, safe and inflammablequality index:charcoal content >85%calorific value >8000 calash content <5%volatilization <15 ...