Below is our Specification for Oak & Hardwood Charcoal. Please get back to us if you desirewant a particular specification. Product: Oak & Hardwood CharcoalOrigin: ThailandMoisture Content: 4%-7% maxFixed Carbon: 70%-82% on dry basisGranulation: 20mm-80mmVolatile matter: 5- 13% MaxAsh Content: 1.5%-4%Burning time: of 3hrs-7hrsNo Fossils, Fuel, Coke, Glass, Metal, Stone e.t.c