This cleaning brush is made of high quality stainless steel spring that can be freely bent and will not become deformed. Designed with double ended, which will be more convenient to cleaning bent pipes and U-shape tube. With two sized cleaning brushes, which suitable for cleaning pipes and glass tubes diameter within 9~35mm. Ideal for cleaning water pump, filters, pipe, connector, and other hard to reach places. Why choose Fdit Tube Brush? Made of high quality stainless steel spring that can be freely bent and will not become deformed.Designed with double ended, which will be more convenient to cleaning bent pipes and U-shape tube.With two sized cleaning brushes, which suitable for cleaning pipes and glass tubes diameter within 9~35mm.Ideal for cleaning water pump, filters, pipe, connector, and other hard to reach places.We have 3 colors, you have more choices on color. Color: Yellow, Blue, Transparent(optional) Package Include: 1 x Tube Brush Specification: Condition: 100% New Brush Wire Material: Nylon Spring Material: Stainless Steel Big Head Brush Size: Approx. 4.7 * 3.2cm / 1.8 * 1.3inch Small Head Brush Size: Approx. 5 * 2cm / 1.9 * 0.8inch Total Length: Approx. 155cm / 61inch Package Weight: Approx. 68g How to use: 1. Slowly push stainless steel spring into the pipe. 2. Drive the cleaning brush cleaning the tube dirt. 3. Clean the product and air drying after using Note: 1. Please allow 1-3cm error due to manual measurement. Thanks for your understanding. 2. Monitors are not calibrated same, item color displayed in photos may be showing slightly different from the real object. Please take the real one as standard.