Duct brush can be used to help remove lint buildup and debris in dryer ducts and other general ducting. Can be used manually or attached to a drill for increased power. Includes a brush head and four 2' flexible rods that can be used to extend the brush up to 8' in length making it suitable for typical clothes dryer duct runs. Flexible nylon rods allow for up to 90 deg (degree) turns. No. PCPBZW: Brush Diameter: 4", Brush Length: 2", Overall Length: Up to 8', Pkg Qty: 1, Package Type: Clamshell Thanks for shopping Hipp Hardware Plus's Online Store for all your DIY and Home Improvement needs. Remember Hipps Help!