Product OverviewBest quality 6" brush made with tough, durable polypropylene bristles Recommended and designed for homeowners who use a brush occasionally Can be used with Stainless Steel and Masonry Chimneys POLYSWEEP polypropylene fiber brushes are made from the highest quality polypropylene fiber; however, all polypropylene will start to melt at 80°C (180°F) do not use a poly brush in warm chimney Round shape Use only at ambient temperature/cool to the touch