Lump wood charcoal Size : 5cm till 15cm (length)/ black color Raw material : hardwood, species tree : all natural hardwood Origin tree : indonesia / aceh (sumatra - indonesia ) Age tree : 20-30 year Methode : charcoal burning Usage : in / out side room ( for bbq/cooking / and for restaurant ) Legal licence : approved by indonesian goverment Specification : Carbon content : 75 - 80.5 % Volatile content : 12-15% Moisture content (mc): 3 - 5% dry Ash content : 2.5-3% Calorie value : 7582.5 or 7600 kcal/kg Fire condition : very good Fire keep time : 4-5 hour/kg Smoke : free Smell : free - imo class : 4.2 - uno : 1362 Only seeing very serious buyer to be invited to work along, other question pls dont hesitate contact my company at any time Thank you 20 kgs in pp.Woven bag