Product review (5 stars): An outstanding product
My dryer vents through the roof via a vertical 4" pipe about 14 feet in height. This kit, along with extra Gardus extensions purchased separately,  did an outstanding job of removing a shockingly surprising volume of lint from the system. The separate lint brush also did an effective job cleaning the dryer itself.  For well less than half the cost of hiring a vent cleaning service, the job was done quickly and easily.