Wood Pellet Inc. was started by a lumber mill in 1992 in Pennsylvania. They actually peel the bark from the logs to sell to mushroom farmers and landscape companies. All the sawdust and ends from the trees are then ground to make the pellets. Only fresh sawdust is used. No Poplar or Basswood trees are used because this will cause a lower Btu and create more ash. This is an all hardwood and is a premium pellet that is short to med length.