"Briquette Chimney Sweep" consisting of Aspen Shavings and Catalyst (~ 85 g), i. flue cleaning combined natural and chemical types. To achieve a good cleaning effect, we recommend using 1 briquette per 50 - 60 kg of fuel. "Briquette chimney sweep" not only cleans the walls of chimneys and fuel equipment, but also heats Ecologically clean, without waste! Put the briquettes on the burning coal together with the packaging.