These brushes have a small amount of horsehair bristles. As a result, they are sucked into the central hole of the collection tube, which hinders the operation of the brush. And I've been using it for a long time! Everything seems crazy. Brushes are made the same way these days. All to reduce production costs and increase profits! If you used to buy a vacuum cleaner, brushes and other gadgets lasted the lifetime of a car! No longer! And interchangeable tools leave me unattended!