[Essential Usage Tips]The brushes are coated with lubricating oil during production to maintain wire stability, which might leave a slight odor and residue. Use paint thinner for initial cleaning. For optimal performance, use the brushes in a clockwise direction to prevent unwinding and shedding. [Comprehensive Multi-size Kit]This kit features 14 pieces with a 12-inch long handle, including both brass and stainless steel brushes. Available in various diameters: 6mm/0.2", 8mm/0.3", 10mm/0.4", 12mm/0.4", 15mm/0.5", 20mm/0.7", 22mm/0.9", it caters to different cleaning needs. [Versatile Cleaning Tool]Ideal for cleaning metal straws, test tubes, and more, this wire cleaning brush set is perfect for and stubborn stains. It's also suitable for polishing, painting, rust removal, and burr cleaning in automotive and machining applications. [Long and Narrow Reach]Featuring a 2.2mm thick spiral knotted wire handle, these brushes are tough and firm, designed to reach narrow tubes and confined areas. Each brush includes a hanging ring for convenient storage and easy transport., Weight: 0.85759819918 pounds, Manufacturer: Frewurwer