The RUTLAND Chimney Sweep® Pellet Stove Vent Brush with Handle is very flexible and includes an attached handle to easily navigate bends and elbows of a pellet stove vent pipe or a dryer vent. Won't scratch or damage metal pipe. Brush filament is 0.020″ poly. For light cleaning only. Available in two different brush sizes (3″ and 4″) and two different handle lengths (10′ and 20′). For heavier buildups, use RUTLAND Chimney Sweep® Pellet Stove Brush, item #PS-3, PS-4, or PS-5.