Up to 24 Feet: Includes 2 synthetic brush head (4inch diameter) and 18 bendable rods (16inch long each). Extends up to 24 feet. for cleaning the trapped lint and dust in dryer gap and exhaust port. Premium Rods with High Flexibility: The nylon brush head is heat-resistant, non- and anti-aging, ensuing higher cleaning efficiency and preventing scratches of interior chimney pipe or dryer duct. Nylon rod is durable and flexible, curving to 90 degrees for duct work. Easy to Use yet Practical: Works perfectly with driller. Connect the driller to the rod with hexagonal adapter and then it can remove the stubborn debris from chimney or dryer vent through strong rotating force. Efficient & Safe: Use this brush to clean the dangerous lint, dust and other pellets buildup in the dryer pipe and vent, which could the dryer's working performance and avoid overheating resulting in fire. Regular removal of lint is the only way to prevent dryer from catching fire. Cost-Saving: You can connect multiple rods to enlarge the cleaning area. Clean the duct by yourself, no more expensive professional cleaning service. Specifications for Brush Head Material: Nylon Color: black Diameter: 100mm/4inch each Length: 40mm/1.6 inch each Weight: 50g/0.1lb each Specifications for Rods Length: 410mm/16inch each Weight: 35g/0.08lb each Package includes: 18 * Rods Dry Duct 1 * cleaning brush with wooden handle 2 * Brush head 1 * connector Only the above package content, other are not included. Note: Light and different displays may cause the color of the item in the a little different from the real . The measurement allowed is +/- 1-3cm.