The pipette and test tube brush is made of pure bristles and is 320 mm long with a 12 mm diameter. This brush is ideal for cleaning pipettes, test tubes, and other laboratory equipment and objects. The bristles are robust and durable, ensuring thorough cleaning. The shape and size of the brush allow even hard-to-reach areas to be cleaned with ease. The brush is easy to handle and allows for efficient cleaning without much effort. A must-have for every laboratory or chemistry class. One pack contains one pipette and test tube brush.