OULII Aquarium Water Hose Pipe Cleaning Brush, Flexible, Double Ended, Sky Blue Color: Sky blue, silver. Material: Stainless steel and plastic. Length: Approx. 61 inch. Brush Diameter: Approx. 0.5 inch for small end, 1 inch for big end. Double ended long brush, flexible and bendable. Perfect for cleaning the interior of assorted hoses. Especially useful for bent pipes, like U-shape tube.