Material - Made of stainless steel and nylon bristles, durable and soft, easy cleaning of the bottom of the water bottle without scratching the items, durable, elasticity, not easy to rust or deform, the bristles are not easy to fall offCleaning Effectively - Small and soft cleaning brush set clean those finer detail, can easy access to hard-to-reach spaces, and quickly scrub away built-up dirt or any stains, no more remaining dust in your lifeErgonomic Handle - The stainless steel handle has certain flexibility and the cleaning brush set can be cleaned with u-shaped and arc-shaped products, and has a loop at the end for easy hangingMultiple Size - Various sizes and abundant quantity can meet you daily use and replacement, you can find a fit tool to clean gaps, clean some hard to reach areas for quick dirt removalWide Application - Can be applied for cleaning most narrow openings, the spout of a teapot, drinking straw, pipes, plug holes, small bottles, colanders, drip tips, espresso machines, eye glasses, etc