[Best combination]: 3 sponge track cleaning brushes (green)+10 replacement cleaning cloths [Durable material]: The window or sliding door track cleaning brush is composed of high-quality ABS plastic handle and polypropylene bristle, which is pollution-free and durable. [Design features]: The newly designed sponge rail cleaning brush can easily clean the dusty shutters and dust, instead of cleaning the shutters one by one. Different kinds of gap brushes will help you remove the dust in any hidden gap. [Widely used]: Use these tools to clean window slots, shutters, air conditioners, automobile vents, sliding/shower door rails, ceramic tile lines, computer keyboards, gas stoves, sinks, faucets, toilet switches, bathtubs, etc. [Easy to clean and store]: The cleaning brush has strong flexibility, wear resistance and thermal deflection. After soiling, wash with water to restore cleanliness. The suspension hole can be suspended, taking up less space.