NUTSHELL %100 ECOLOGICAL FIREPLACE BRIQUETTES 22.04 LBS (10 kg) *Nutshell Ecological Briquette ; is produced 100% natural nutshells and contains no poisonous additives that might be harmful to the surrounding environment. *Nutshell Ecological Briquette ; is solely made of ground and dried hazelnut shells with no additives or chemicals used in the manufacturing process, therefore, make an eco-friendly product. *Nutshell Ecological Briquettes ; long combustion and high calorific value compared to its unit price makes it more economical relative to the charcoal products in the market. *Wood has a lower calorific value than Nutshell Ecological Briquette , it has 35-45% moisture ratio as opposed to only 3% than Nutshell Ecological Briquette. *Therefore, it is more energy sufficient and effective with Nutshell Ecological Briquettes as you generate more heat from the same amount of product.