8″ Round, Polypropylene, Torque Lock Connector – Master Sweep Chimney Brush Master Sweep is the premier chimney brush that has set the industry standard. This long lasting professional brush withstands the demanding use of busy chimney sweeps. Master Sweep is the brush to clean chimneys more thoroughly while outlasting all others. Designed with the professional in mind for cleaning insulated metal chimneys, stainless steel, or metal stove pipes. These long-lasting, sturdy poly brushes have 7″ of fill and are acid resistant. .075 poly filaments. With easy to connect and disconnect Torque Lock Connector ends. Use Rutland Products rods item #59FT-4 (4′ fiberglass), #59FT-5 (5′ fiberglass), #59FT-6 (6′ fiberglass), #PFT-34-3 (3′ poly), or #PFT-78-5 (5′ poly).