High-quality material: It is made of high-quality plastic, which is durable and does not need to be replaced frequently, so it will not cause too much damage to the curtain. Package: Including 100 pieces curtain track wheels, plenty in number, for your daily use and replacement. Design: The special design allows the pulley to be directly installed on the curtain slide, without removing the two ends of the curtain rod, which improves work efficiency and is more convenient to use. Easy to use: the curtain rollers can hold the curtain firmly and the appearance is smooth, it is not easy to jam the track when the curtain is opened or closed. Scope of application: these curtain sliders are suitable for most standard curtain rods and are widely used in windows, bathrooms, offices, bedrooms, etc.