Lignetics premium quality wood pellets are PFI (Pellet Fuels Institute) Certified Premium Grade Pellet Fuel and made from a proprietary blend of 90% hardwood and 10% softwood. Manufactured with the highest quality controls to produce a 3 to 5% moisture content pellet with 8000 to 8300 BTU/Lb. (British thermal unit) output and 0.4 to 0.6% ash content for a hotter, more efficient burn and less waste. Density greater than 40 Lb./Cu. Ft. (Pound/Cubic Foot)