This item is well made of premium material for durable and practical use. All brushes have a convenient loop at the end of the handle to when not in use or to reattach to a ring for safe keeping. A good helper for your experiment life. Features - Color: As shown. - Material: Nylon, bristles. - Size: 30.00X10.00X10.00cm/11.79X3.93X3.93 inch. - High-quality materials make these cleaning brushes very durable and long lasting. - These cleaning brushes are very comfortable to use, simple and convenient to clean. - The wonderful detail will ensure its high performance as excellent cleaning flask brush. - They will not scratch the flask and keep the bottle safe and clean, practical and durable brush. - Exquisite craftsmanship and creative design guarantee their durability and popularity.