Package contents - 2 piece double-ended brush (blue and yellow), two different styles of cleaning brushes - 10 pieces of black aquarium brushes in different sizes - Total of 12 pieces to meet diverse cleaning needs Easy to use - Use a mild lotion and warm water - Keep the tube as straight as possible - Gently work the brush in a back and forth motion, gradually going further inside the tube - Avoid aggressive use when cleaning Size and compatibility - Double-ended brush: total length 61.02 inch (155 cm) - Big brush diameter: 1.18 inch (30 mm) - Small brush diameter: 0.7 inch (18 mm) - Suitable for cleaning water pipes and glass tubes with a diameter of 0.47-1.38 inch (12-35 mm) - Aquarium brushes set length: 7.87 inch (200 mm) - Each brush head diameter: 0.98 inch, 0.79 inch, 0.59 inch, 0.47 inch, 0.39 inch, 0.31 inch, 0.24 inch, 0.20 inch, 0.16 inch, 0.12 inch - Great for daily cleaning of fish tanks and for home kitchen use Multifunction and design - 10 different brush sizes allow you to choose the appropriate size for the situation - All brushes feature a convenient loop at the end of the handle to hang when not in use or to reattach to a key ring for keeping - The double-ended brush is flexible and long, with two different sized brushes, especially useful for bent pipes such as U-shaped tubes Use scenarios - Aquarium maintenance: clean glass panels and tubing in daily tank care - Home kitchen and utility: clean narrow-neck bottles, glassware, straws, and other small-diameter tubes - General tubing and pipe cleaning: reach bent or curved sections with the flexible double-ended brush and the variety of sizes in the set