Our Wood Pellets is in match to DIN51731 Available Wood: Pine, Beech, Birch, Poplar, Etc. Necessary contents of the Analysis and comparison Specification Test result DIN51731 Diameter mm 6 4-10 Length mm 30 <50 Unit density g/cm3 1.20 1-1.4g/cm3 Humidity 8% <12% Ash content 2% <2.5% (lower)calorific value >4300 4180-4658Kcal/Kg Other Available Material: Corn Core, Peanut Husk, Paddy Husk, Cottonseed Husk, Etc.