Made of Stainless Steel and soft nylon bristles for cleaning and comes in different sizes that cover most standard sized tubes, pipes and bottles we use at home. Ten-piece Mini Metal and Nylon Tube Pipe cleaner brush comes with a detachable keychain , Great for cleaning straws, fans, appliances and small appliances. Durable, Reusable, Strong and lasts longer than any other products in its category. It is great for removing moisture and residue from pipes and accessories. Clean Airbrushes, silicone, glass ,bottle straw, Cell Phones, Colanders, Espresso Machines, Eyeglasses and more. This pipe cleaner brush is extremely easy to clean, you just need to rinse it with water after use, then hang it on a hook until dry. All brushes have a convenient loop at the end of the handle to hang when not in use or to reattach to the key ring for safe keeping. Green Piece strengthens the hardness of the bristles, improved the cleaning ability without scratching your items; the bristles are tightly wrapped around the handle and can't easily fall. It is made of Stainless Steel and Nylon bristles and comes in different sizes that cover most standard sized tubes, pipes and bottles we use at home. The 4.5 Inches deep cleaner is exceptionally durable, REUSABLE, and lasts longer than any other products in its category.