Comprehensive Set: This 7-piece tube brush kit includes brushes with diameters of 6mm/0.2inch, 8mm/0.3inch, 12mm/0.4inch, 15mm/0.5inch, 18mm/0.65inch, 20mm/0.7inch, and 22mm/0.9inch. Each brush features an 11.8inch long, making it perfect for reaching deep into tubes and bottles for thorough cleaning. High-Quality Brass Wire: Crafted from premium brass wire, these brushes offer soft yet bristles that gently clean without scratching surfaces. Ideal for sensitive jobs, the brushes and can be reused multiple times for various cleaning tasks. Flexible and Malleable Handle: Designed for versatility, the long, bendable handles allow easy access to narrow and hard-to-reach spaces. The flexibility of the handles aids in maneuvering around curves and corners, ensuring every spot is scrubbed clean. Versatile Cleaning Tools: Perfect for a range of applications, these brushes effectively remove dirt, dust, and grime from steam radiators, bottle necks, keyboards, and more. Each brush includes a looped end for easy hanging storage or attachment to a key ring for convenience. Efficient Cleaning Solution: The varied sizes and resilient design of these brushes make them an essential tool for maintenance in homes, garages, or workshops. They are particularly effective in cleaning areas where ordinary brushes can't reach, providing a comprehensive cleaning solution. Color: As Shown Material: Brass Package Contents: 7 * Brass Tube Brush(6/8/12/15/18/20/22mm) Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.