Description PRODUCT DETAILS:Best quality brush made with tough, durable polypropylene bristlesRecommended and designed for homeowners who use a brush occasionallyCan be used with Stainless Steel and Masonry ChimneysPOLYSWEEP polypropylene fiber brushes are made from the highest quality polypropylene fiber; however, all polypropylene will start to melt at 80ÂC (180ÂF) do not use a poly brush in warm chimneyRound shapeUse only at ambient temperature/cool to the touch