Our Machine-made charcoal is made from pure wood sawdust without any chemicals. It's environmentally friendly charcoal.It's especial suit for BBQ and stoves . Features: 1) No smoke, no odor, ignite quickly and safely 2) Longer burning time than common charcoal: More than 3 hours 3) No additives, high density, totally carbonized 4) Widely used in living (especially in BBQ), chemistry, metallurgy, construction and agriculture 5) Shape: Hexagonal,inside is hollow Specifications: 1) Calorific value: 8000-8,300 calories 2) Ash content: <5% 3) Fixed carbon: ≥85% 4) Volatile matter: <4.5% 5) Moisture: <4%