1. Package Include: the package contains 2 pieces double ended brush (blue, yellow), 1 piece of each color and 10 pieces of different sizes black aquarium brushes set, total of 12 pieces, enough quantity to meet your diverse needs, 2 different styles of cleaning brush can meet your daily needs of many kinds of use2. Easy to use: use a mild lotion and warm water, keep the tube as straight as possible and gently work the brush in a back and forth motion, gradually working further inside the tube; Avoid aggressive use when cleaning3. Size: the double-ended brush total brush length 61.02 inch/ 155 cm, big brush diameter is 1.18 inch/ 30 mm, small brush diameter is 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, 0.2 inch, 0.16 inch, 0.12 inch), great for your fish tank daily cleaning and home kitchen use4. Multifunction: the aquarium brushes set has 10 different sizes brush, you can choose the size you need according to the situation, all brushes have a convenient loop at the end of the handle to hang when not in use or to reattach to the key ring for keeping; The double-ended brush is flexible and long, which comes with 2 different sized brushes, especially useful for bent pipes, like U-shape tube