Package Contents: You will receive 3 pieces of brass wire brush, with a length of 17.5cm/6.9 inches each. Product Material: This copper brush is made of copper wire, sturdy and capable of removing rust, designed specifically for cleaning the hotbed of 3D printer nozzles. Curved Streamlined Design: Both the brush head and handle of this brush are designed with a curved shape, increasing the contact area between the handle and hand, reducing grip strength during use, and improving work efficiency. Excellent Quality: Our nozzle cleaner has a smooth surface. Compared to similar products, it can remove burrs and rust more quickly. Wide Application: This copper cleaning brush is suitable for cleaning steel parts, machinery, paint stains, special corrosion, doors, floor tiles, and more.