USDA certified kiln dried, completely organic NO chemicals used. Wood can be used with or without charcoal. These chunks burn longer than chips, which will help infuse wood fired flavor. Quality wood will produce a higher quality food. Can be used in any grill, smoker, pizza oven, big green egg, kamado joe, weber, primo or porcelain grill anything that a 3 in. sq. piece will fit into. Wood fired flavor is the best. Wood is an ingredient too, so start with quality wood to produce quality food. Take your cooking to the next level by starting with Smoak Firewood's competition grade quality products. Smoak with the best wood. Experience the difference.