Soot-removal granules 85867, ideal for improving the performance of furnaces and boilers. Advantages : Prevents clogging of the ducts by increasing the calorific value. Decomposes and removes tar incrustations Removes dirt build-up in braziers, combustion chamber, furnace and boiler ducts Features : Material : Wood Weight (kg): 1.6 Packaging : 1x box of granules