The Chimney Cleaning Brush Kit includes 18 flexible rods and a flue sweep brush with a round shape, suitable for cleaning chimneys, fireplaces, and stoves. The brush has a diameter of about 4.3 inches and is made of durable nylon material. The kit is designed for indoor and outdoor use, making it ideal for removing buildup and debris from various types of flues and pipes. With a total of 21 pieces included, this chimney brush and rods set is essential for maintaining a clean and efficient heating system.