Wood pellet is made from natural material(mixed wood or pure pine wood) which is used for barbeque, heating and stove fuel.It''s environmentally correct raw material sources and 100% natural process. Specification Quality Result Diameter(mm) 4-10 Length(mm) 20-50 Unit Density(g/cm3) 1.2 g/cm3 Humidity <=8% Ash Content Mixed Wood:<=2.5%; 100% Pine Wood: <=1.5% (Lower)Calorific Value >=4200 Kcal/Kg