This tube brush has an overall length of 12 inches, a brush length of 4 1/2 inches, and a diameter of 1 1/4 inches. The short handle is a twisted wire with a loop style and is made from galvanized material. The twisted stem has a diameter of 0.172 inches. The black-coloured bristles are made from nylon and have a fill diameter of 0.014 inches. This tube brush is designed for cleaning out small tubes, drill holes, or other small, confined spaces.