The Wooly Brush® channel cleaning brush offers a 60% longer bristle head, maximizing cleaning effectiveness by boosting the number of bristles sweeping the channel. Match its larger brush head with its stiffer catheter and you can just feel the difference. Extensive quantity of bristles maximize cleaning ability by boosting bristle touches throughout the channel Sturdy orange catheter and rounded, fluorescent tip to enhance visibility and help guide the extended brush along the delicate channel Flexible brush head helps take on the shape of the channel, passing through bends and sharp turns with ease