Product review (5 stars): When your builder is an idiot and your dryer run is over 20 feet this is a perfect tool.
Because our house builder was an idiot we have a very long dryer run. Even with cleaning the lint tray every load, the vent was filled with lint after 4 years. The brush was perfect size and even had an allen key to prevent a lost brush. For the price this is well worth it. Stop trying to fab up something when this product works. The rods are very flexible and will make some turns in the pipe. Well worth the cheap price