This semi-stiff, nylon fiber bristle brush is perfect for scrubbing narrow glassware, including test tubes, measuring cylinders, beakers and more. The fanned end allows you to easily clean rounded surfaces and corners. The stainless steel, twisted handle is semi-flexible, allowing you to modify the shape as needed. Looped end for easy hanging. Designed for professional science laboratories but is perfect for a variety of applications in the home or garage. Brush measures 12.25" in total length, with the bristle section measuring 4.25" and 1.5" in diameter, and handle measuring 8". Fits inside items with diameters of 1.2" - 1.4".