What are the classification of test tube brush?

Test tube brushes are primarily classified based on their size, shape, and bristle material. Size classifications include small, medium, and large brushes, tailored to fit different diameters of test tubes and laboratory glassware. Shape classifications can include straight, bent, or spiral brushes, designed for specific cleaning angles and access. Additionally, bristle materials can vary, with options such as nylon, stainless steel, or natural fibers, each suited for different cleaning applications and surface types.