Cleaning a chimney is not only a very vigorous task but also is one that places extreme demands upon all of the tools that you happen to be using at a given time. With the 7 inch Diameter Round Professional"s Choice Polypropylene Brush Head with TLC Torque Lock Connector, you have a piece of equipment that has been engineered to give your chimney the most rigorous and thorough cleaning possible so that it can continue to function at peak efficiency. Professional"s Choice round chimney brush head with a 7-inch overall diameter. Features the newer TLC-style torque lock connector. Polypropylene bristles are designed for removing soot from fossil fuels in coal, oil or gas flues where the acids may deteriorate steel bristles. Brush head has a has a single spiral 0.177 dia. spindle design. The 0.075-inch poly filaments are 7 inches of fill. Professional"s Choice brushes are moderately priced chimney brushes that are rugged enough to stand the everyday demands of the busy sweep.